Leave Your Solar Panel Installation Work in Hachioji City, Tokyo to Kakeru Koumuten Co., Ltd.!
For solar panel and storage battery installation in
Hachioji City, Tokyo,
Kakeru Koumuten is at your service!
Kakeru Koumuten is a company specializing in exterior renovations.
As a company strong in roofing work, we are entrusted withsolar panel installation and storage battery work considering roofing and waterproofing!
“How to Choose a Solar Panel Contractor in Hachioji City, Tokyo”
“Costs for Solar Panel and Storage Battery Installation”
“Subsidies Available for Solar System Installation in Hachioji City, Tokyo”
We will also explain the above three points!
The installation of solar panels carries risks, such as“the occurrence of leaks” and other troubles.
To ensure a satisfactory solar panel installation, we recommend obtainingthree estimates!
Table of Contents (tap to open/close)
- Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installation in Hachioji, Tokyo
- Roof Inspection Before Installing Solar Panels
- Potential Subsidies and Grants Available in Hachioji, Tokyo
- Price List for Solar Panel and Storage Battery Installation
- Breakdown of Installation Capacity, Equipment, and Construction Costs
- Self-Estimate and Profit Simulation for Solar Power Generation
- Customer Testimonials
- Case Studies of Solar Panel Installations
- How to Choose a Solar Panel Installer in Hachioji, Tokyo
- Benefits of Introducing Solar Equipment
- Points to Consider When Introducing Solar Power Generation
- How to Choose Solar Panels
- Frequently Asked Questions About Solar and Storage Battery Installation in Hachioji, Tokyo
- If You Are Looking for a Solar Panel Installer in Hachioji, Tokyo, Contact Kakeru Koumuten
- Characteristics of Hachioji, Tokyo and Key Points for Solar Installation
- Service Area in Hachioji, Tokyo
Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installation in Hachioji, Tokyo
Here are the reasons why our customers in Hachioji, Tokyo trust us with their solar panel installations.
“Our Unique Strengths in Solar Panel Installation That Cannot Be Replicated by Other Companies”
have received high praise from many customers.
so we would appreciate it if you could compare our estimates with those of other companies.
Because we are confident, we welcome estimates from any number of companies!
1. We Also Handle Exterior Renovations Beyond Solar Panel Installation!
Issues such as leaks that occur during solar panel installation may be caused by insufficient checks on the roof and waterproofing at the installation site.
Even if one is knowledgeable about solar panels, there are cases where the roof and waterproofing at the installation site are outside their expertise, so caution is necessary.
It is reassuring to have someone knowledgeable about the roof to avoid maintenance and issues after installation!
Kakeru Koumuten Co., Ltd. specializes in roofing work and can also detach and attach solar panels in-house, allowing for quick responses to maintenance and urgent issues after solar panel installation!
2.Facilities Specialized in Exterior Renovation
Kakeru Koumuten Co., Ltd. has prepared the following warehouses and material storage areas to provide low-cost, high-quality solar work and exterior renovations.
We have established five bases for material storage and showrooms.
In-house Scaffolding Materials
To ensure safety during work on the roof, we own the scaffolding materials necessary for temporary scaffolding based on construction conditions and can assemble scaffolding ourselves.
By not outsourcing scaffolding work and using our own scaffolding team, we can also cut costs related to scaffolding work.
We own scaffolding materials for approximately 50 single-family homes!
Even if there are height differences on the site, our in-house scaffolding team will plan the scaffolding according to the local conditions.
Storage of Materials in Our Large In-house Warehouse
We store roofing materials and paints, and we can also store removed solar panels.
By ordering a large quantity of materials at once, you canpurchase materials at a lower cost!
Additionally, we always have a stock of roofing materials, so we canrespond quickly in emergencies!
In-house sorting and transportation of waste materials
The installation of solar panels often involves roofing work, resulting in various waste materials such as paint, wood, and metal.
By sorting and recycling waste materials, we can significantly cut waste disposal costs.
Exterior renovation dedicated showroom
In the showroom, not only can you have meetings, but you can also
check the actual foundation brackets for solar panels and see how they are installed on roofing materials!
We can also provide simulations for potential earnings and installation costs when introducing solar panels!
Since roofing and exterior wall work often accompany each other, we also have samples of roofing materials and models that explain the structure, allowing us to provide detailed explanations!
3.All work performed by our own team
One of Kakeru Koumuten’s major strengths is its complete in-house construction.
By having Kakeru Koumuten handle everything from inquiries to project completion in a consistent manner, we can keep costs down and provide high-quality roof renovations.
Additionally, one representative will assist you from the estimate to the completion of the work.
Since the person in charge does not change, whether it’s the sales representative or the construction management representative, smooth communication is possible.
We can provide consistent in-house construction from temporary scaffolding installation, exterior wall painting, to roof renovations!
4. Various Permits and Skilled Workers
We have obtained construction industry licenses and permits for industrial waste collection and transportation!
We also have nationally certified sheet metal and painting technicians, and we are confident in our construction skills.
We can also handle large-scale roof projects such as factories!
5. Warranty and Aftercare
In addition to the manufacturer’s warranty for solar panel installation work, we also provide our own construction warranty (leakage warranty)!
(The construction warranty for solar panel installation is 10 years. Depending on the condition of the roof before installation, we may not be able to provide a warranty unless roof renovations are performed. The construction warranty is separate from the manufacturer’s product warranty, and the coverage and conditions vary depending on the warranty details.)
Aftercare is available every year, and we send out annual notification DM.
If you have questions about the warranty, please click on the image above!
6. Flexible and Prompt Response
Our company is equipped to handle various roofing troubles and situations.
If you cannot access the roof due to height, we can utilize drones to assist!
During leak investigations, we can also conduct surveys using a thermal imaging camera.
If the power generation of solar panels decreases due to dirt, we can provide cleaning with a specialized brush.
We will respond according to your wishes.
7. Human Resource Development
To improve skills, we create various roof models and conduct practical training.
Since the construction methods change depending on the shape and slope of the roof, we regularly provide technical training so that each staff member can handle various cases.
8. Creation of Easy-to-Understand Materials and Simulations
Kakeru Koumuten provides not only “estimates,” “layout diagrams,” and “power generation simulations” but also a “solar panel installation guidebook” and “profit and loss simulations” that take into account loan interest rates and electricity costs.
The profit and loss simulation can be created for projected cumulative profits and losses over 20 to 30 years.
Even customers who are not familiar with solar panel installations will receive easy-to-understand materials that include points to note and disadvantages!
We encourage you to obtain comparative estimates and compare them with other companies’ plans!
Roof Inspection Before Installing Solar Panels
Once solar panels are installed, they will remain on the roof for 20 to 30 years.
Confirming “Is it okay to install directly on the current roof?” before installation is the key point to prevent leaks and unnecessary expenses!
Kakeru Koumuten, which specializes in roofing work, has summarized the items to check before installation.
| 1. Types of Roofing Materials and Year of Construction | The fixing method varies depending on the roofing material, such as slate, tile, metal roofs, and flat roofs (roof waterproofing). If the remaining lifespan of the roofing material is short, we may suggest roof renovation first. |
| 2. Condition of the Substrate and Waterproof Sheet | If the underlayment or roofing (waterproof sheet) beneath the roofing material is damaged, it can affect the fastening strength and waterproofing. We will also check for any signs of water leakage. |
| 3. Orientation, Slope, and Shadows of the Roof | The orientation and slope of the roof surface, as well as shadows from neighboring houses, trees, and utility poles, can affect power generation. We will create a layout diagram from the drawings and the site, and you can confirm it with a power generation simulation. |
| 4. Shape of the Roof and Usable Area | The number of panels that can be installed (installation capacity) is determined by the shape and size of the roof. The number of panels that can be installed varies depending on the size of the panels, so we will compare based on the total output of the roof. |
| 5. Fixing Method and Waterproofing Details | We will check whether the method involves drilling holes in the roofing material for fastening or using brackets to secure the roofing material. The fixing method varies by technique, so please confirm the waterproofing treatment method for the fixed parts during the estimate. |
| 6. Weight of the Roof | The roof will become heavier due to the panels being installed. After investigating the existing roof, substrate, and load-bearing capacity, switching to lighter roofing materials may also be an option if necessary. |
| 7. Location of Equipment Installation and Wiring | We will confirm the installation locations for the power conditioner and storage battery, as well as the wiring route to the distribution board. The length of the wiring also affects the cost. |
| 8. Ease of Scaffolding Setup and Delivery Routes | If there are elevation differences on the site, planning for scaffolding and the delivery routes for equipment and materials may require some ingenuity. The width of the front road and any steps on the site will also be checked during the site survey. |
Fixing Methods and Checkpoints by Roofing Material
| Roof Material | Main Fixing Method | Pre-Installation Check Points |
|---|---|---|
| Slate Roof | Varies by method (e.g., fixing brackets to the roof material and substrate with screws) | Waterproof treatment of fixing parts, cracks or deterioration of slate, condition of the substrate. If deterioration is significant, consider roof overlay (cover method) or replacement first. |
| Tile Roof | Fixed with brackets and methods suitable for the type of tile (even methods that do not drill holes in the tiles will secure to the substrate) | Type and condition of tiles, substrate, load-bearing capacity. Depending on the investigation results, there may be methods to replace with lighter roofing materials before installation. |
| Metal Roof (Horizontal and Vertical) | Fixed with catch-type brackets that grip the roof material (depends on the combination of roof material and brackets) | Whether the roof material and brackets are compatible, installation conditions from the roof material manufacturer. If compatible, methods that do not drill holes may be available. |
| Flat Roof / Rooftop | Fixed by installing a frame | Type and deterioration status of the waterproof layer, waterproofing around the frame. Consider in conjunction with the timing of waterproofing work. |
If you renovate the roof 10 to 20 years after installation, there will be additional costs for the removal and reinstallation of solar panels. If the roof is deteriorating, renovating to a highly durable roofing material before installation may help reduce costs in the long run.
Kakeru Koumuten Co., Ltd. specializes in roofing work and can also handle the removal and reinstallation of solar panels, so please consult us according to the condition of your roof!
▶ Click here for roof renovations in Hachioji City, Tokyo
PossibleSubsidies and Grants
If you are introducing solar panels or storage batteries in Hachioji City, Tokyo, the systems from the “National Government,” “Tokyo Metropolitan Government,” and your local “Hachioji City” may be applicable.
The following information is based on the official pages of each system as of October 7, 2026. The acceptance status may change depending on the budget, so please check the latest information before contracting or starting work.
Eligibility Conditions and Application Timing for Subsidy Programs
| Program | Main Eligibility Conditions | Subsidy Amount | Application Period & Status |
|---|---|---|---|
| Tokyo Metropolitan Government “Promotion of Solar Power Generation Installation in Households” | Individuals, corporations, or management associations installing unused solar power systems (output less than 50kW, JET certification, etc.) in residential properties within Tokyo. The generated power must be used in the living area. Pre-application is required. | Existing homes: 15,000 JPY per kW for up to 3.75 kW (maximum 450,000 JPY), 12,000 JPY/kW for over 3.75 kW to under 50 kW. New homes: 12,000 JPY/kW for up to 3.6 kW (maximum 360,000 JPY), 10,000 JPY/kW for over 3.6 kW. |
For the fiscal year 2026, pre-applications are being accepted from May 29 (will end once the budget is reached). From the pre-application for fiscal year 2026, submission of a certificate issued by a financial institution is mandatory at the time of performance report. |
| Tokyo Metropolitan Government “Promotion of Storage Battery Installation in Households” | Owners of eligible devices (storage batteries registered with SII, excluding national and local governments). Installation must occur between April 1, 2026, and March 30, 2031. If applying after October 1, 2026, only products registered with the national SII for fiscal year 2026 are eligible. | Storage battery package: 100,000 JPY per kWh (maximum 1,200,000 JPY per household). Additional incentive for participating in DR demonstration (100,000 JPY per unit; 150,000 JPY per unit if energy management equipment is installed). Expansion of storage battery units: 60,000 JPY/kWh (maximum 720,000 JPY per household). |
For the fiscal year 2026, pre-applications are being accepted from May 29. Grant application and performance report will start from June 30. |
| Hachioji City “Subsidy Program for Installation Costs of Renewable Energy Utilization Equipment” (Fiscal Year 2026) | Individuals registered as residents in Hachioji City (small business owners must have a business location in the city) installing in non-new homes. It is required to purchase or install equipment from a business located in the city. Storage batteries are only eligible if installed simultaneously with solar power generation (SII registered, with a storage capacity of 3 kWh or more). Application is required before the start of construction. | Solar power generation: 10,000 JPY per kW (maximum 100,000 JPY). Solar carports, etc. (those that have obtained special permission under the renewable energy utilization promotion area system): 30,000 JPY per kW (maximum 150,000 JPY). Lithium-ion storage batteries: 30,000 JPY. |
Starting from April 22, 2026, on a first-come, first-served basis. Applications for solar power and storage batteries in the general category have ended, and applications for the waiting list are currently being accepted (the waiting list will be granted if there are vacancies due to construction cancellations). Applications for solar carports, etc. are still being accepted (updated September 4, 2026). |
| National “DR Household Storage Battery Program” (Fiscal Year 2025 Supplement) | New installation of household storage systems that can be utilized for DR (demand response) with registered products. | Calculated based on a standard amount of 34,500 JPY per initial effective capacity of 1 kWh (subsidy rate within 3/10, maximum 600,000 JPY per application). | The budget was reached on May 29, 2026, and the public recruitment has ended (there are no plans to reopen public recruitment as stated on the official website, and applications cannot be made at this time). |
| National “Mirai Eco Housing 2026 Program” (Renovation) | Storage batteries are one of the eligible facilities, but they must be combined with essential construction work such as insulation renovation of windows (openings) and the building structure; installation of storage batteries alone cannot be applied for. Solar panels are not included as eligible facilities. | Storage Battery: 96,000 JPY/unit | Ends as soon as the budget limit is reached. As of October 5, 2026, the official site indicates that the application amount for renovations is 8% of the budget. Please check the official site for the application status. |
The Tokyo solar and storage battery subsidy program requires prior application. Storage batteries applied for after October 1, 2026, must be registered products under the national SII, and equipment requirements will change. The subsidy in Hachioji City requires application before the start of installation work, and the general application for solar and storage batteries for the 2026 fiscal year has ended, with applications now being accepted for the reserve category (grants will be provided if there are openings due to project cancellations after the budget limit is reached). Eligibility conditions, application procedures, and the possibility of combining with other programs differ for each system, and applying does not guarantee a grant, so please confirm before contracting or starting work.
Kakeru Koumuten Co., Ltd. will provide guidance on eligibility conditions and application periods for each program after confirming them.
National Subsidy “DR Home Storage Battery Project (Support Project for Home Storage Systems for DR Resource Introduction)”
The national government has been implementing the “DR Home Storage Battery Project” to support the installation of home storage batteries.
This program targets those who are newly introducing registered storage systems that can be utilized for demand response (DR), and in the 2025 fiscal year supplementary project, the subsidy amount was determined based on a standard amount of 34,500 JPY per initial effective capacity of 1 kWh, with a subsidy rate of up to 30% and a maximum of 600,000 JPY per application. There are also conditions such as being ineligible for items contracted or ordered before the grant decision.
However, the 2025 fiscal year supplementary applications reached the budget on May 29, 2026, and the public offering has ended. The official site also states that there are no plans to reopen the public offering, and applications cannot be made at this time. Please check the official site for future public offerings.
Additionally, there are currently no subsidies confirmed for the installation of solar panels on existing homes.
👉 Click here for the official site of the DR Home Storage Battery Project
Tokyo “Promotion Project for the Introduction of Solar Power Generation in Homes”
This subsidy is for those who are newly installing unused solar power generation systems in residential homes in Tokyo. The simultaneous installation of storage batteries is not a condition.
● Existing Homes: For 3.75 kW or less, 150,000 JPY per kW (maximum 450,000 JPY); for over 3.75 kW and under 50 kW, 120,000 JPY per kW.
● New Homes: For 3.6 kW or less, 120,000 JPY per kW (maximum 360,000 JPY); for over 3.6 kW and under 50 kW, 100,000 JPY per kW.
● Additional amounts are available for the installation of rooftop frames and waterproofing work.
The target is to install unused panels with an output of less than 50kW that have obtained JET certification, in residential areas within Tokyo, for use in living spaces. The process involves prior application followed by a grant application after installation. Starting from the prior application for the fiscal year Reiwa 8, it has become mandatory to submit a certificate issued by a financial institution at the time of performance reporting.
According to the official page of Tokyo, prior applications are being accepted from May 29, Reiwa 8. The acceptance will end once the budget is reached, so please check the official page for the status of applications.
👉 Here is the official page of Tokyo (Cool Net Tokyo)
Tokyo’s “Promotion Project for the Introduction of Storage Batteries in Households”
This is a subsidy for the installation costs of storage battery systems aimed at increasing self-consumption of electricity generated by solar power and enhancing energy independence during emergencies.
● Storage battery package: 100,000 yen per kWh (maximum 1,200,000 yen per household)
● Additional for participating in DR demonstration: 100,000 yen per unit (150,000 yen per unit if energy management equipment is installed)
● Expansion of storage battery units: 60,000 yen per kWh (maximum 720,000 yen per household)
The target is the owners of eligible equipment (excluding national and local governments), and installation must be completed between April 1, Reiwa 8, and March 30, Reiwa 11. If applying for prior application after October 1, Reiwa 8, only products registered with the national SII for the fiscal year Reiwa 8 are eligible.
According to the official page of Tokyo, prior applications are being accepted from May 29, Reiwa 8. Please check the official page for detailed conditions regarding combinations with solar power generation.
👉 Here is the official page of Tokyo (Cool Net Tokyo)
Hachioji City “Subsidy System for Installation Costs of Renewable Energy Utilization Equipment” (Fiscal Year Reiwa 8)
This subsidy is for individuals registered as residents in Hachioji City (including small and medium-sized enterprises with a business office in the city) who install solar power generation systems or lithium-ion storage batteries in non-new homes. It is required to purchase or install equipment from businesses that have a business office in the city. Storage batteries are only eligible if introduced simultaneously with solar power generation, and a minimum storage capacity of 3kWh registered with SII is required. Applications must be made before the start of construction, and those that commence construction before the grant decision are not eligible.
● Solar power generation: 10,000 yen per kW (maximum 100,000 yen)
● Solar carports, etc. (those with special permission): 30,000 yen per kW (maximum 150,000 yen)
● Lithium-ion storage battery: 30,000 yen
Applications are accepted on a first-come, first-served basis starting from April 22, Reiwa 8, and the general application for solar power generation and storage batteries has ended. Currently, applications for the waiting list are being accepted, where 20 applicants will be selected after the budget limit is reached, and grants will be awarded if there are vacancies due to project cancellations. The official page states that applications for solar carports, etc. are still ongoing (updated September 4, 2026).
It is possible to combine with subsidies from the national government and Tokyo Metropolitan Government, but if the total amount exceeds the purchase cost, the city’s subsidy will be adjusted. For more details, please check the official page.
👉 Here is the official page of Hachioji City
Solar Panel Installation & Battery Installation Price List
⇧ Service Menu | For costs related to solar panel installation and battery installation, click here
⇧ Service Menu | For costs related to solar panel removal and water heater removal, click here
Breakdown of Installation Capacity, Equipment, and Construction Costs
The costs for solar panels and batteries should be checked separately for “Equipment Costs (Equipment Price)” and “Construction Costs”.
Even for the same “Complete Solar Panel Installation,” the amount can vary greatly depending on the installation capacity, equipment grade, and roof condition.
Understanding Installation Capacity (kW) and Battery Capacity (kWh)
The installation capacity of solar panels is determined by “Output of one panel (W) × Number of panels”, with the unit being kW (kilowatt). Batteries are compared in terms of the amount of electricity they can store, expressed in kWh (kilowatt-hour).
The amount of kW that can be installed on the roof varies for each house based on the shape, orientation, and size of the roof. At Kakeru Koumuten, we create layout diagrams from blueprints and on-site surveys to present the installation capacity.
On our pricing page, we list solar panels as approximately 800,000 JPY to 1,200,000 JPY for 3 to 5 kW, and 1,200,000 JPY to 1,900,000 JPY for 6 to 10 kW. (These are just estimated amounts and may vary based on factors such as wiring length, scaffolding area, existing roofing materials, and panel layout.)
▶ Installation Menu | Costs for Solar Panel Installation and Battery Installation
Items to Confirm in the Estimate (Cost Confirmation)
When comparing estimates, it is common to compare different capacities and equipment based solely on price. Please check if the following items are clearly stated in each company’s estimate!
| 1. Solar Panels | Manufacturer, model number, output per panel (W), number of panels, and total installation capacity (kW) should be listed. |
| 2. Power Conditioner | Manufacturer, model number, capacity, number of units, and installation location (indoor/outdoor). Also confirm whether it is a type that controls the battery as a unit. |
| 3. Battery | Manufacturer, model number, capacity (kWh), range of use during power outages (entire house or specific circuits), and installation location. |
| 4. Mounting Frame and Hardware | Name of the hardware suitable for the roofing material and the method of securing it (whether it involves drilling holes or clamping). |
| 5. Wiring and Electrical Work | Wiring route and length, work around the distribution board, and whether there is a monitor to check power generation. |
| 6. Roof Reinforcement and Waterproofing | Details of waterproofing treatment at fixed points, and whether necessary roof repairs and substrate reinforcements are included. |
| 7. Applications | How much support is included for applications to the power company, certification for selling electricity (FIT), and subsidy applications. |
| 8. Scaffolding | Scope and quantity of scaffolding. If it is simultaneous with roofing work or exterior painting, check that the same scope and quantity are not double-counted. |
| 9. Removal and Disposal | Whether the removal of existing solar water heaters or old panels and the disposal costs of waste materials are included. |
| 10. Tax Classification and Warranty | Whether the price is tax-inclusive or tax-exclusive, conditions under which additional costs may arise, and details and duration of manufacturer and workmanship warranties. |
If the capacities differ, both the price and power generation will change. Kakeru Koumuten Co., Ltd. welcome price comparisons, so if you bring estimates from other companies, we will explain the differences item by item!
Self-Estimate and Profit Simulation for Solar Power Generation
With the simulator above,
you can get an estimated quote and a financial simulation for up to 30 years!
If you know the total installation capacity of solar panels on the roof and the capacity of the storage battery, you can obtain an estimated quote and financial simulation!
*The simulation results are estimates. Actual financial results may vary based on assumptions such as electricity rates, self-consumption ratios, selling prices, and costs for equipment inspection and replacement.
Customer Feedback
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customer reviews
Asao-ku, Kawasaki City | We received reviews about the ridge cap and rain gutter replacement work!
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customer reviews
Kohoku-ku, Yokohama | We received reviews about the roof overlay (cover method)!
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customer reviews
Kohoku-ku, Yokohama | We Received Reviews About Exterior Painting!
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customer reviews
Hodogaya-ku, Yokohama | We received reviews about our exterior fence construction!
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customer reviews
Tsurumi-ku, Yokohama | We received reviews about roof and exterior wall painting, as well as metalwork and rain gutter replacement work!
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customer reviews
Higashiyamato City, Tokyo | We received reviews about exterior painting and roof overlay (cover method)!
Case Studies of Solar Panel Installations
| Construction Details |
| Solar Panel Installation Battery Installation |
| Existing Roofing Material |
| Horizontal Metal Roof (Super Galtect) |
| Installation Capacity |
| Solar Panel: 4.3kW Battery: 5kWh range |
| Base Mounting Hardware Used |
| Niigata Manufacturing / Aluminum Catch-Type Hardware |
| Fixing Method & Waterproofing Arrangement |
| Fixed using catch-type hardware gripping the horizontal metal roof (Catch Method) |
| Price Range |
| 2,200,000 JPY～2,300,000 JPY ※Due to the grant being provided, the actual burden amount is approximately 1,000,000 JPY Estimated recovery period for construction costs: about 8 to 9 years (self-consumption) ※The grant amount and recovery estimate are based on the system and calculations at the time of construction, and may differ under the current system. |
| Construction Period |
| Approximately 3 days |
| Completion Month |
| April 2025 |
| Inquiry Details |
| I am considering the introduction of solar panels and storage batteries. I heard that grants are available, and I would like to know how much will be provided. |
Our Proposal
We visited to provide an estimate and created a layout diagram for the solar panels from the drawings!
The layout diagram shows the arrangement of solar panels when placed on the roof.
Since we can also determine the installation capacity, it allows for power generation simulations and financial simulations.
We have also understood the expected amount of the grant, so we explained it to the customer along with the estimate!
How to Choose a Solar Panel Installation Contractor in Hachioji City, Tokyo
There are many solar panel installation contractors available in Hachioji City, Tokyo, and you may be unsure which contractor to choose.
Therefore, when requesting solar panel installation and storage battery installation work, let’s confirm the following four points:
● Have extensive knowledge not only about solar panels but also about roofs
● Confirm the existence of warranties and after-sales maintenance
● Obtain estimates from multiple contractors (three companies as a guideline)
● Check if they provide support for subsidy applications
By confirming the above four points, you will be able to choose a reliable contractor.
Knowledge about roofs as well as solar panels
Improper installation of solar panels can be caused by a lack of knowledge and verification regarding roofs and waterproofing.
While knowledge about solar panels is certainly important, understanding the roof and waterproofing at the installation site of the solar panels is also crucial.
⚠︎Examples of troubles caused by insufficient verification of roofs and waterproofing
・Solar panels were installed on a severely deteriorated roof, resulting in leaks
・Solar panels were installed on a roof with a short lifespan, necessitating renovations for removal and reinstallation within a few years
・Misjudgment of the type of waterproofing led to incorrect treatment, causing leaks
and more
When installing solar panels, understanding the condition and type of the existing roof allows you to avoid unnecessary expenses and unforeseen troubles.
▶ Go to “Roof Verification Before Installing Solar Panels” in this article
Confirm the existence of warranties and after-sales maintenance
When choosing a solar installation contractor, let’s confirm the existence of warranties. It is important to check not only the duration of the warranty but also the coverage, exclusions, and cost conditions.
While the solar panels and storage batteries come with a manufacturer’s warranty, also check for the existence of a workmanship warranty in case leaks occur after installation!
For contractors that offer a workmanship warranty, if leaks occur after installation, they may cover the repairs under the warranty if it falls within the warranty period and conditions.
Additionally, some contractors offer after-sales services separate from warranties, so make sure to check if the contractor you are considering has after-sales service.
Since abnormalities or damage on the roof may not be visible, you might not notice them yourself.
By conducting inspections of hidden areas through after-sales maintenance, you can more easily detect abnormalities early and prevent major repairs or failures!
Kakeru Koumuten Co., Ltd. provides a rain leak warranty as part of the workmanship warranty for solar panel installations. (The warranty for solar panel installations is 10 years, and depending on the condition of the roof before installation, we may not be able to provide the warranty without performing roof renovations.)
We also conduct aftercare maintenance and send out annual DM!
After checking the DM, if you wish, we will visit you for aftercare maintenance!
Obtain estimates from multiple contractors (3 companies as a guideline)
When requesting solar panel installation, let’s obtain estimates from multiple contractors.
Even for the same manufacturer and the same construction content, costs may vary, and warranties and after-services may differ.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your desired contractor at a lower price, we recommend obtaining estimates from multiple contractors.
When comparing estimates,
“Check the estimate items”
“Types of solar panels”
“Warranties and after-services”
let’s compare them in detail and make a judgment! Avoid judging solely based on cost, as using lower-grade materials or skipping processes can reduce costs!
▶ Go to “Breakdown of installation capacity, equipment, and construction costs” in this article
Check if they provide support for subsidy applications
There may be subsidies available for solar panel installations and battery installations, but if the order of procedures is incorrect or if there are deficiencies in the documents, the subsidy may not be granted.
Since there are systems like the Tokyo subsidy that require prior application, it is reassuring to have a contractor that supports the preparation of necessary documents and the flow of procedures.
Complete the procedures specified for each system (for the Tokyo subsidy, prior application) before proceeding with the construction!
For the Tokyo subsidy, after installation, you will need to submit a grant application and performance report, which will be reviewed before the grant is provided! (The flow of procedures varies by system)
▶ Go to “Subsidies and grants that may be applicable in Hachioji City, Tokyo” in this article
Benefits of Introducing Solar Equipment
The benefits of introducing solar panels are the following 5 points!
Benefit 1: Economic Benefits
The biggest advantage of introducing solar panels is the economic benefit!
The selling price of electricity has decreased compared to 10 years ago, but by consuming the generated electricity, you can reduce the amount of electricity purchased from the utility company and gain benefits!
As electricity prices rise, the ability to cover your consumption with solar power becomes attractive!
If you plan to use the generated electricity at night, installing a storage battery is essential!
Furthermore, the selling price (FIT) for residential use (under 10kW) will be set at “24 yen/kWh for the first 4 years, and 8.3 yen/kWh from the 5th to the 10th year” for certifications after October 2025, and the same price will apply for the 2026 fiscal year. After the 5th year, it is generally more advantageous to use it at home (self-consumption) rather than selling it, so combining it with a storage battery becomes an option.
👉 Ministry of Economy, Trade and Industry | For purchase prices and periods, click here
Advantage 2 Subsidies can be utilized!
Subsidy conditions and amounts vary by prefecture and municipality, but if you meet the conditions, you may be able to utilize subsidies!
Reducing the actual burden through subsidies is a significant advantage!
In Hachioji City, there is a possibility that the national, Tokyo Metropolitan, and Hachioji City systems may apply. The general application for solar power and storage batteries for the 2026 fiscal year has ended, and applications for the supplementary slot are now being accepted (please check the official page for application status).
Advantage 3 Environmentally friendly!
Solar power generation has low carbon dioxide emissions and can reduce dependence on fossil fuels, contributing to the mitigation of global warming.
Solar panels themselves do not produce noise or exhaust gases during the generation process, making them an environmentally friendly method of power generation. (However, devices such as power conditioners do have operational noise.)
Advantage 4 Heat insulation effects can be expected!!
By installing panels on the roof or rooftop, they block direct sunlight from hitting the roof.
Especially in summer, this can help reduce the temperature of the roof, providing a heat insulation effect!
(Note that this does not improve the building’s insulation performance itself.)
Benefit 5 Electricity can be used even during power outages!!
If a storage battery is installed, it becomes possible to use electricity even during emergencies such as power outages!
Even without a storage battery, if you have a power conditioner with autonomous operation capability, you may be able to use electricity from a dedicated outlet during daytime generation.
(The devices, output, and duration that can be used during a power outage vary depending on the model and wiring method.)
What points should be noted when introducing solar power generation?
Next, we will explain the “three points to note” when installing solar panels!
Point 1 Maintenance costs can be incurred
A particularly overlooked maintenance cost is for the roof where solar panels are installed.
If you perform roof renovations 10 to 20 years later, there will be costs for removing and reinstalling the solar panels.
If the existing roof is deteriorating, it is reassuring to renovate it with durable roofing materials before installing solar panels!
Additionally, there will be costs for regular inspections of the equipment, repairs or replacements of the power conditioner, and updates due to the deterioration of the storage battery.
It would be reassuring to consider maintenance costs in simulations before introducing solar panels!
Point 2 The risk of leaks increases depending on the roofing material
The fixing methods for slate roofs and tile roofs vary by construction method, but when fixing hardware with screws to the roofing material or substrate, waterproofing at the fixed points is crucial.
If the method involves making holes in the roof, there will inevitably be a risk of leaks.
Of course, we will ensure proper waterproofing, but if you are concerned about making holes, replacing the roofing material with a metal roof and fixing the solar panels using the catch method is also an option. (The catch method has compatibility conditions between the roofing material and hardware, and it cannot be used with all metal roofs.)
Catch-type base hardware for horizontal metal roofs
Point 3 The Roof Becomes Heavier
Installing solar panels will make the roof heavier. After investigating the existing roof, substrate, and load capacity, replacing with a lightweight roof may also be an option if necessary.
How to Choose Solar Panels?
There are many manufacturers of solar panels, and their output and costs vary.
It is not simply a matter of “This manufacturer has the best solar panels”; it is important to choose solar panels that are suitable for your life plan and building!
Here are some points to consider when comparing solar panels!
How to Choose 1: Compare Based on Total Roof Output
When installing solar panels on the roof, it is important to consider how much electricity can be generated in a limited area, and generating more electricity is always better!
The sizes and outputs of solar panels vary by manufacturer.
A 350W output panel and a 400W output panel may seem that the higher output panel is better at first glance.
However, if the size of the panel does not fit well with the roof, there may be cases where “20 panels of 350W can be installed” and “15 panels of 400W can be installed,” resulting in different numbers of panels that can be installed on the same roof due to size differences.
400W×15 panels = 6kW (total output of the roof)
350W×20 panels = 7kW (total output of the roof)
As shown above, even if the output of a single panel is lower, the total output of the roof may be higher!
It is important to consider the total output of the roof rather than the output of a single panel!
*The above is a calculation of total output (kW). The actual electricity generation (kWh) will vary depending on conditions such as the roof’s orientation, slope, and shading.
How to Choose 2: Compare Based on Degradation Rate of Solar Panels
Solar panels have a degradation rate, and their output gradually decreases over 10 years and 20 years.
The degree of output decline after long-term use varies by product. The manufacturer’s output guarantee value is a standard figure for the warranty and does not indicate the actual degradation rate or the amount of electricity generated.
By not deciding solely based on initial output and considering the degradation rate, you can choose solar panels without regrets!
How to Choose 3: Compare Based on Warranty Period
Solar panel warranties include various types such as “output warranty,” “natural disaster warranty,” and “system warranty,” and the warranty periods vary by manufacturer.
Regarding output warranties, some manufacturers offer a 30-year warranty while others offer a 10-year warranty, so there is a wide range!
Longer warranties are better, so be sure to check the warranty periods and conditions of the manufacturers you are considering!
Frequently Asked Questions about Solar Power and Storage Battery Installation in Hachioji City, Tokyo
We have compiled frequently asked questions from customers considering the installation of solar panels and storage batteries in Hachioji City, Tokyo. (Tap to open answers)
How much does it cost to install solar panels and storage batteries in Hachioji City, Tokyo?
The cost varies depending on the installation capacity, equipment, and condition of the roof. In the above construction example (solar panel 4.3kW + storage battery, completed in April 2025), it was 2.2 million yen to 2.3 million yen.
Estimates by capacity are available on our solar panel and storage battery installation pricing page. We will create a layout diagram from the drawings and site survey and provide a free estimate!
Are there any subsidies available for solar and storage battery installation in Hachioji City, Tokyo?
As of October 7, 2026, Tokyo’s “Promotion Project for Solar Power Generation in Households” (for existing homes, 15万円 per kW for up to 3.75kW, maximum 450,000 yen) and “Promotion Project for Storage Battery Installation in Households” (100,000 yen per kWh, maximum 1.2 million yen per household) are accepting pre-applications starting May 29, 2026, as listed on the official Tokyo (Cool Net Tokyo) page. Hachioji City has a subsidy system for the installation costs of renewable energy utilization equipment (10,000 yen per kW for solar power, maximum 100,000 yen; 30,000 yen for lithium-ion storage batteries), and as of the 2026 fiscal year, the general application for solar power and storage batteries has ended, with only the waiting list currently accepting applications, as stated on Hachioji City’s official page. The national DR household storage battery project has closed its public recruitment.
Since the application status may change, please refer to the subsidy and grant section and consult with us before signing a contract.
Can I apply for subsidies after the construction is completed?
This depends on the system. Tokyo’s subsidies require pre-application, and Hachioji City’s grants also require application before the start of construction. Conditions such as whether you can sign a contract or start construction before applying may vary by system, so please confirm before signing a contract.
The order of procedures varies by system, so please check before signing a contract or starting construction.
Can solar panels be installed on a slate roof? I’m worried about leaks.
It is possible to install on a slate roof, but it is necessary to check the condition of the roofing material and substrate. The method of securing varies by construction method, and when securing brackets to the roofing material or substrate, waterproofing treatment of the secured parts is crucial.
Kakeru Koumuten is a specialized exterior renovation company strong in roofing work, so we will check the condition of the roof before installation and suggest methods such as roof overlay (cover method) or replacement if deterioration is advanced.
My roof is old. Should I do a roof renovation first?
This depends on the condition of the roof. If a roof renovation is needed within 10 to 20 years after installation, there will be additional costs for dismantling the solar panels. If the remaining lifespan of the roof is short, it may be more cost-effective to renovate to a highly durable roofing material before installation.
Please consult us on how to proceed with the installation after checking the condition of the roof during the site survey!
Is it better to install a storage battery together with solar panels?
If you want to use the electricity generated at night or prepare for power outages, simultaneous installation is recommended. The selling price will be 8.3 yen/kWh after the fifth year, making it more advantageous to use it at home rather than selling it.
Additionally, the Tokyo Metropolitan Government’s subsidy for storage batteries (for the Reiwa 8 fiscal year, 100,000 yen per kWh, with a maximum of 1,200,000 yen per household) aims to increase self-consumption of electricity generated by solar power. Hachioji City’s subsidy program also includes lithium-ion storage batteries (which must be installed simultaneously with solar power) (the general application for the Reiwa 8 fiscal year has ended; please check the official page for the status of the waiting list). You can compare “solar power only” and “solar power + storage battery” through a financial simulation.
How many kW can be installed on our roof? Is it okay for north-facing roofs or roofs with shadows?
The capacity that can be installed varies depending on the shape, orientation, and size of the roof. At Kakeru Koumuten, we create a layout diagram based on the drawings and site survey, and we will provide you with the installation capacity and power generation simulation.
Hachioji City is a basin-shaped area surrounded by hills and mountains to the north, west, and south, and the shape and orientation of the roof, as well as the shadows cast by surrounding buildings, vary from house to house. You can check the expected power generation through the power generation simulation.
How long will the construction period be?
In the above construction example (solar panel 4.3 kW + storage battery), it took about 3 days. The duration may vary if roof work is done simultaneously or depending on the shape of the roof and installation capacity.
Additionally, please note that there is a separate period required for applications for subsidies and power companies, so please consult us as soon as possible.
What is the current selling price (FIT)?
For residential use (under 10 kW), the selling price from certifications after October 2025 will be 24 yen/kWh for the first 4 years, and 8.3 yen/kWh from the 5th to the 10th year, and the same price will apply for the 2026 fiscal year.
The idea is to recover the initial costs more quickly in the first 4 years and then focus on self-consumption. Kakeru Koumuten provides a financial simulation that considers loan interest rates and electricity prices.
Can you handle maintenance and inspections after installation?
Yes, we can. Kakeru Koumuten sends out annual after-service maintenance DM notices and visits customers who wish to have inspections. We can also clean solar panels with a special brush if the power generation decreases due to dirt.
Since it is difficult to check areas on the roof by yourself, please feel free to consult us if you have any concerns.
Can you also handle renovations for roofs that already have solar panels installed?
Yes, we can. Kakeru Koumuten can detach and reattach solar panels in-house, allowing us to remove the panels, perform roof overlay (cover method) or re-roofing, and then reinstall them consistently. The removed panels can be stored in our own warehouse.
For costs, please refer to the solar panel removal and hot water heater removal pricing page.
If you are looking for a solar panel installation company in Hachioji City, Tokyo, please consult Kakeru Koumuten
Our company handles many exterior renovations, including solar panels, roof work, and exterior wall work in Hachioji City, Tokyo.
We receive requests from many customers, including renovation companies and real estate agencies, who contact us!
Kakeru Koumuten promises “high-quality renovations at low cost”, and we have received great feedback from many customers.
We continue to update our annual construction achievements and will strive to improve quality to satisfy even more customers in the future.
Our company can perform all exterior renovations, not only roof overlay (cover method) and re-roofing work but also partial roof repairs, exterior painting, and exterior wall cover methods.
We are happy to handle small jobs such as partial repairs and rain gutter cleaning!
In urgent cases such as leak repairs, we may be able to provide emergency measures without setting up scaffolding, as long as safety can be ensured, so please consult with us!
“I want to know about recommended solar panels”, “I want to keep costs as low as possible”, “I just want an estimate for now”, we will provide the best solutions for your specific requests.
We will never propose unnecessary work that prioritizes profit!
We always stand in our customers’ shoes and will propose the best construction plan!
We are confident that we will not lose in terms of cost, quality, and planning for exterior work compared to other companies!
We are confident, so we welcome competitive quotes!
Estimates are completely free, and if our company is found to be inferior to others, you are free to decline!
Characteristics of Hachioji City, Tokyo and Points of Solar Work
Hachioji City is located approximately 40 kilometers west of central Tokyo, covering an area of 186.38 square kilometers. The terrain is generally basin-like, surrounded by hilly areas with elevations ranging from 200 to 800 meters to the north, west, and south, while the east leads to the Kanto Plain, as stated on the official city page. According to the city’s plan, the terrain is broadly classified into four categories: mountainous, hilly, plateau, and lowland, with mountains represented by Takao and Jinba in the west, and 18 first-class rivers flowing through the city, forming terraces along the rivers. We have summarized the characteristics of Hachioji City, Tokyo, and points to consider when installing solar panels and storage batteries below. (Tap to open)
View the characteristics of Hachioji City, Tokyo, and points for solar installation
■ A city with mountainous, hilly, plateau, and lowland areas. Check the delivery routes for sites with slopes and elevation differences
The city features various terrains, including mountains, hills, plateaus, and lowlands, with differences in elevation and road conditions varying from one property to another. For properties facing slopes or with elevation differences from the road, it may be necessary to devise methods for scaffolding and the delivery routes for panels and storage batteries. Kakeru Koumuten Co., Ltd. plans scaffolding tailored to the site with its own scaffolding team, creates layout diagrams from blueprints and site surveys, and allows you to confirm through power generation simulations.
■ Check the hazard maps for flooding (external water), internal water, and landslide disasters. Be cautious about the installation location of equipment
Hachioji City’s hazard map includes information on flooding (external water), rainwater discharge (internal water), and landslide disaster (special) warning areas designated by Tokyo, with information published in March of Reiwa 5 based on data from December of Reiwa 4. The same page also notes that the color indicating flood depth cannot distinguish between external and internal water on the map. The impact of power conditioners and storage batteries during flooding may vary depending on whether they are installed indoors or outdoors. Please check the assumptions for your location on the city’s map and consult about the installation location and height in conjunction with the installation conditions of the manufacturer you will use.
■ The types and ages of roofs vary from house to house. Check the roof and waterproofing before installation
Even within the same city, the types of roofs, their ages, and the shapes of the properties vary from one house to another. The capacity and fixing methods that can be installed depend on the shape and orientation of the roof and the materials used. Kakeru Koumuten Co., Ltd. will propose fixing methods, waterproofing details, and scaffolding plans after confirming the type and condition of the roof and the situation of the property before installation.
■ The annual sunshine hours at the Tokyo Observatory are approximately 1,927 hours
According to the Japan Meteorological Agency’s average values (1991-2020), the annual sunshine hours at the Tokyo Observatory are approximately 1,927 hours, with January (approximately 193 hours) being the month with the most sunshine, and June during the rainy season (approximately 124 hours) having the least. (This is a reference value, not based on observations in Hachioji City.)
The power generation in Hachioji City can also be affected by shadows from hills, mountains, surrounding buildings, and trees, so conducting annual power generation simulations and selecting the capacity of storage batteries to match the times of high electricity usage are key points.
Our company handles a lot of exterior work and solar panel installations in Hachioji City, Tokyo.
We are happy to assist with partial roof repairs such as roof overlay work, roof replacements, and leak repairs, as well as other repairs! Please feel free to consult us for any sudden troubles!
Service Area in Hachioji City, Tokyo
Kakeru Koumuten Co., Ltd. accepts requests from all over Kanagawa Prefecture and Tokyo.
List of Areas in Hachioji City, Tokyo
Akiyama-cho, Hachioji City / Asahicho, Hachioji City / Higashimachi, Hachioji City / Ishikawacho, Hachioji City / Izumicho, Hachioji City / Inumecho, Hachioji City / Uenomachi, Hachioji City / Uchikoshi-cho, Hachioji City / Uzuki-cho, Hachioji City / Uzunuki-cho, Hachioji City / Umezu-cho, Hachioji City / Urakakao-cho, Hachioji City / Oiwake-cho, Hachioji City / Otsuka, Hachioji City / Ofunacho, Hachioji City / Otani-cho, Hachioji City / Ooyoko-cho, Hachioji City / Owada-cho, Hachioji City / Ogata-cho, Hachioji City / Ozaki-cho, Hachioji City / Ozu-cho, Hachioji City / Kashima, Hachioji City / Kazume-cho, Hachioji City / Katakuracho, Hachioji City / Kanoya-cho, Hachioji City / Kamiiwabukata-cho, Hachioji City / Kamionogata-cho, Hachioji City / Kamikawacho, Hachioji City / Kamiyuzuki, Hachioji City / Kawaguchi-cho, Hachioji City / Kawamachi, Hachioji City / Kitano-dai, Hachioji City / Kitano-cho, Hachioji City / Kinugao, Hachioji City / Kiyokawacho, Hachioji City / Kunieda-cho, Hachioji City / Kuboyama-cho, Hachioji City / Koshino, Hachioji City / Kohiki-cho, Hachioji City / Komiya-cho, Hachioji City / Koyasu-cho, Hachioji City / Sairi-cho, Hachioji City / Sanada-cho, Hachioji City / Shimoonogata-cho, Hachioji City / Shimoyuzuki, Hachioji City / Shiroyama-te, Hachioji City / Shinmachi, Hachioji City / Suwa-cho, Hachioji City / Sennin-cho, Hachioji City / Hira-cho, Hachioji City / Takao-cho, Hachioji City / Takakura-cho, Hachioji City / Takatsuki-cho, Hachioji City / Taki-yama-cho, Hachioji City / Tatemachi, Hachioji City / Tamachi, Hachioji City / Tanakimachi, Hachioji City / Daitamachi, Hachioji City / Terada-cho, Hachioji City / Teramachi, Hachioji City / Tenjin-cho, Hachioji City / Tsuruzato-cho, Hachioji City / Tobuki-cho, Hachioji City / Nakacho, Hachioji City / Nakano-kamimachi, Hachioji City / Nakano-San’no, Hachioji City / Nakano-cho, Hachioji City / Nakayama, Hachioji City / Nagatsuna-cho, Hachioji City / Nagabou-cho, Hachioji City / Nanakuni, Hachioji City / Namiki-cho, Hachioji City / Narahara-cho, Hachioji City / Nanyodai, Hachioji City / Nishi-Asakawa-cho, Hachioji City / Nishi-Katakura, Hachioji City / Nishi-Terakata-cho, Hachioji City / Nibun-kata-cho, Hachioji City / Hazama-cho, Hachioji City / Hachiman-cho, Hachioji City / Hatsuzawa-cho, Hachioji City / Higashi-Asakawa-cho, Hachioji City / Higashi-Nakano, Hachioji City / Hyoe, Hachioji City / Hiyoshi-cho, Hachioji City / Hiraoka-cho, Hachioji City / Fujimimachi, Hachioji City / Bessho, Hachioji City / Horinouchi, Hachioji City / Hongomachi, Hachioji City / Honcho, Hachioji City / Matsugaya, Hachioji City / Matsuki, Hachioji City / Maruyama-cho, Hachioji City / Misaki-cho, Hachioji City / Mitsuidai, Hachioji City / Midori-cho, Hachioji City / Minami-Asakawa-cho, Hachioji City / Minami-Oosawa, Hachioji City / Minami-Shinmachi, Hachioji City / Minami-cho, Hachioji City / Minamino, Hachioji City / Miyashita-cho, Hachioji City / Miyama-cho, Hachioji City / Myojin-cho, Hachioji City / Mejiro-dai, Hachioji City / Moto-Hachioji-cho, Hachioji City / Moto-Hongo-cho, Hachioji City / Moto-Yokoyama-cho, Hachioji City / Yagi-cho, Hachioji City / Tani-no-cho, Hachioji City / Yamada-cho, Hachioji City / Yari-mizu, Hachioji City / Yoka-cho, Hachioji City / Yokokawa-cho, Hachioji City / Yokoyama-cho, Hachioji City / Yotsuya-cho, Hachioji City / Manmachi, Hachioji City
・Trust Kakeru Koumuten for exterior wall painting in Hachioji, Tokyo!
・Trust Kakeru Koumuten for roof renovations in Hachioji, Tokyo!
・Trust Kakeru Koumuten for exterior renovations in Hachioji, Tokyo!
・Kakeru Koumuten Co., Ltd. construction achievements
・Kakeru Koumuten Co., Ltd. aftercare services
・Kakeru Koumuten Co., Ltd. construction menu and price list
・Kakeru Koumuten Co., Ltd. staff blog and announcements
・Explaining the importance of comparative estimates and key points!
・Top 12 solar power generation manufacturers! Features and selection tips included!
・What are the installation costs for solar power generation? Comprehensive tips to reduce costs!
・What are the best locations for solar power installation? Key points for site selection included!
・Check out our solar power generation estimates here!
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contact Kakeru Koumuten Co., Ltd.
Kakeru Koumuten is a young company whose team is, on average, in their late twenties, but our skills are second to none.
Our greatest strength is that we handle scaffolding, roofing and painting entirely in-house. In an industry where these tasks are usually divided among contractors, our complete service simplifies project management and helps keep costs down. Above all, if a problem arises, we respond promptly.
We proudly describe ourselves as the youngest and most helpful renovation company in Kanagawa!
