For solar panel and battery installation in
Musashino City, Tokyo,
Kakeru Koumuten is your trusted choice!
Kakeru Koumuten specializes in exterior renovations.
We have handled numerous exterior renovations in Musashino City, Tokyo,
and we are also entrusted with the installation of solar panels and batteries!
Here, we would like to introduce“Why Kakeru Koumuten is chosen for solar panel installation”.
“How to Choose a Solar Panel Contractor in Musashino City, Tokyo”
“Costs for Solar Panel and Battery Installation”
“Subsidies Available for Solar System Installation in Musashino 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, it isessential to obtain estimates from at least three companies!
For customers considering the introduction of solar panels in Musashino City, Tokyo,
this information will definitely be helpful, so please take a look!
目次
- 1 Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installation in Musashino City, Tokyo
- 1.1 1. We can also handle exterior renovations other than solar panel installation!
- 1.2 2.Equipment specialized for exterior renovations
- 1.3 3.Complete In-House Construction
- 1.4 4. Various Permits Obtained & Skilled Workers on Staff
- 1.5 5. Warranty and Aftercare
- 1.6 6. Flexible and Prompt Response
- 1.7 7. Human Resource Development
- 2 Potential Subsidies and Grants in Musashino City, Tokyo that May Apply
- 3 Solar Panel Installation & Battery Installation Price List
- 4 Self-Estimate and Profit Simulation for Solar Power Generation
- 5 Customer Feedback
- 6 Case Studies of Solar Panel Installations
- 7 How to Choose a Solar Panel Installation Contractor in Musashino, Tokyo
- 8 Benefits of Introducing Solar Power Equipment
- 9 What points should be noted when introducing solar power generation?
- 10 How to Choose Solar Panels?
- 11 If you are looking for a solar panel installation contractor in Musashino City, Tokyo, please consult Kakeru Koumuten Co., Ltd.
- 12 Characteristics of Musashino City, Tokyo
Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installation in Musashino City, Tokyo
Regarding why we are entrusted with solar panel installation by customers in Musashino City, Tokyo,
“Our strengths in solar panel installation that cannot be imitated 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.
We are confident, so we welcome estimates from any number of companies!
1. We can also handle exterior renovations other than solar panel installation!

Most troubles such as leaks caused by solar panel installation are due to the lack of knowledge of the solar panel installation contractors.
While contractors specializing in solar panel installation have knowledge about solar panels, many lack understanding regarding the roof and waterproofing at the installation site.
For peace of mind and to avoid maintenance issues and troubles after installation, it is better to have expertise in roofing!
Kakeru Koumuten Co., Ltd. is strong in roofing work and can also detach and attach solar panels in-house, allowing us to respond quickly to maintenance and urgent troubles after solar panel installation!
2.Equipment specialized for exterior renovations
At Kakeru Koumuten Co., Ltd., we have prepared the following warehouses and material storage areas to provide solar work and exterior renovations at low cost and high quality.
We have established five bases for material storage and showrooms.
In-house ownership of scaffolding materials


We own the scaffolding materials necessary for the installation of solar panels, allowing us to set up scaffolding in-house.
By conducting scaffolding work with our own scaffolding team instead of outsourcing, we can also reduce the costs associated with scaffolding work.
We have scaffolding materials for approximately 50 single-family homes!
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, we can purchase materials at a lower cost!
Additionally, we always have a stock of roofing materials, allowing us to respond quickly in emergencies!
Separation and transportation of waste materials in-house
The installation of solar panels often involves roofing work, generating various types of waste materials such as paint, wood, and metal.
Most contractors dispose of these materials all together, but by sorting and recycling the waste, significant cost savings on waste disposal can be achieved.
Exterior Renovation Dedicated Showroom


In our 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 the roofing materials!
We can also provide simulations for the revenue 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 show the structure, allowing us to provide detailed explanations!
3.Complete In-House Construction
One of Kakeru Koumuten’s major strengths is our complete in-house construction.
From inquiry to project completion, everything is handled by Kakeru Koumuten Co., Ltd. This allows us to keep costs down while providing high-quality roof renovations.
Additionally, one representative will assist you from the estimate to the completion of the work.
Since the same person will handle everything, including sales and construction management, smooth communication is possible.
We can provide consistent in-house construction services from temporary scaffolding installation to exterior wall painting and roof renovations!
4. Various Permits Obtained & Skilled Workers on Staff


We have obtained construction industry permits and permits for industrial waste collection and transportation!
We also have nationally certified sheet metal and painting specialists on staff, giving us confidence in our construction techniques.
We are capable of handling large-scale roofing projects such as those for factories!
5. Warranty and Aftercare
In addition to the manufacturer’s warranty for solar panel installation, we also provide our own rain leak warranty!
Aftercare is available annually, and we send out notification DM each year.
If you have any 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 a drone to assist!
During rain leak investigations, we can also conduct surveys using a thermal imaging camera.
If the power generation of your solar panels decreases due to dirt, we can also provide cleaning services with a specialized brush.
We will respond according to your preferences.
7. Human Resource Development
We are creating various roof models to enhance our skills and conducting practical training.
Since the construction methods vary depending on the shape and slope of the roof, we regularly provide technical training to ensure that all staff can handle various cases.
Potential Subsidies and Grants in Musashino City, Tokyo that May Apply
National Subsidy “Support Program for the Introduction of Storage Battery Systems in Housing”
The government is implementing the “Support Program for the Introduction of Storage Battery Systems in Housing” to support the installation of storage batteries.
This subsidy provides 30,000 yen per kWh (with a maximum limit of 600,000 yen) for those who install residential storage batteries that meet certain conditions.
Additionally, this program is part of the government’s efforts to promote zero carbon emissions and renewable energy, allowing for further advancement of “self-consumption” of electricity when used in conjunction with solar power generation.
For detailed eligibility requirements and application methods, please check the official website.
👉 Click here for the official website
Tokyo’s Subsidy Program “Promotion of Solar Power Generation Installation in Households”
“Subsidy Program for Power Conditioner Replacement Costs Related to Solar Power Generation Systems”
Eligible Participants
This subsidy is available to residents of Tokyo who have already installed a solar power generation system and are replacing only the power conditioner.
Requirements and Conditions
The power conditioner to be replaced must be unused.
Regarding solar modules, they must have JETPVm certification or IECEE‑PV‑FCS certification, or be products of equivalent or higher standards.
Subsidy Rate and Amount
Half of the replacement costs will be subsidized, with a maximum limit of 100,000 yen per power conditioner.
For more details, please click here!
“Promotion of Battery Storage System Installation in Households (Disaster-Resilient and Health-Contributing Insulated and Solar Homes Expansion Project)”
Eligible Participants
This subsidy program targets individuals and households installing new battery storage systems in residential properties within Tokyo. It is a requirement that a solar power generation system is already installed or that it is installed simultaneously with the battery storage system.
Requirements
Eligible systems must be registered battery storage equipment with SII (Environmental Co-Creation Initiative), and overlapping subsidies from other municipalities or public corporations are not permitted. The installation period is from April 1, 2025, to March 30, 2029, and a “Grant Application and Performance Report” must be submitted after a prior application.
Subsidy Rate and Amount
Subsidies for the installation costs of battery storage systems are provided at a fixed rate (per kWh). Instead of a percentage of the costs, a predetermined amount is granted as the upper limit. Additionally, participation in demand response (DR) demonstrations will provide further benefits.
Battery storage package (new installation): The subsidy limit is 120,000 yen per 1 kWh of storage capacity. An additional 100,000 yen can be added for participation in DR demonstrations.
Expansion of battery units (additional to existing battery storage): Subsidies of up to 80,000 yen per 1 kWh are available, with the condition that a solar power system is already installed. Additional benefits for DR participation are also applicable.
Energy management devices and IoT-related devices: Participation in DR demonstrations is mandatory, and subsidies are provided for half of the eligible expenses (up to 100,000 yen).
Please see here for more details!
Musashino City “Efficient Energy Utilization Promotion Subsidy System”
Eligible Participants
Individuals residing in Musashino City and registered in the basic resident register are eligible. If the residence is rented or leased, consent from the owner is required for installation. In the case of collective housing, consent from all co-owners or the management association is required when renovating shared areas. The installation of equipment is limited to existing residential buildings; newly built homes are not eligible.
Requirements
The equipment eligible for the subsidy must be unused energy-saving or energy-generating equipment. The systems covered by the program include solar power generation systems, fuel cells (Ene-Farm), high-insulation windows (including interior and exterior windows, glass replacements, etc.).
Subsidy Amount
1/5 of the purchase and installation costs of the equipment
*Maximum amount of 10ten thousand yen
Solar Panel Installation & Battery Installation Price List
Self-Estimate and Profit Simulation for Solar Power Generation
With the simulator above,
you can obtain an estimated quote and a profit 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 get an estimated quote and profit simulation!
Customer Feedback
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: 5KW class |
| Base Mounting Hardware Used |
| Niigata Manufactured / Aluminum Catch Type Hardware |
| Price Range |
| 2.2 million yen to 2.3 million yen *Due to the subsidy provided, the actual burden amount is approximately 1 million yen Estimated recovery period for construction costs: approximately 8 to 9 years (self-consumption) |
| Construction Period |
| Approximately 3 days |
| Completion Month |
| April 2025 |
| Inquiry Details |
| I am considering the installation of solar panels and a storage battery. I heard that subsidies are available, and I would like to know how much subsidy can be expected. |
Our Proposal
We visited to provide an estimate and created a layout diagram for the solar panels based on the drawings!
The layout diagram shows the arrangement of solar panels on the roof.
Since we can also determine the installation capacity, it allows for power generation simulations and financial simulations.
We have also figured out the expected amount of subsidies, which we explained to the customer along with the estimate!
How to Choose a Solar Panel Installation Contractor in Musashino, Tokyo
There are many solar panel installation contractors available in Musashino, Tokyo, and it can be confusing to decide which one to choose.
Therefore,when requesting solar panel installation or storage battery installation work, be sure to check the following 4 points.
● Have extensive knowledge not only about solar panels but also about roofs
● Confirm the presence of warranties and aftercare services
● Obtain estimates from multiple contractors (at least 3 companies)
● Check if they provide support for subsidy applications
By confirming the above 4 points, you will be able to choose a reliable contractor.
Knowledge of roofing in addition to solar panels
Many causes of poor installation of solar panels stem from a lack of knowledge on the part of the contractor.
While knowledge about solar panels is certainly important, understanding the roof and waterproofing at the installation site is also crucial.
⚠︎Examples of troubles due to contractor’s lack of knowledge
・Solar panels were installed on a deteriorated roof, resulting in leaks..
・Solar panels were installed on a roof with a short lifespan, necessitating a renovation for removal and reinstallation within a few years..
・Misjudging the type of waterproofing led to incorrect treatment and subsequent leaks..
and more
When installing solar panels, understanding the condition and type of the existing roof allows you to avoid unnecessary expenses and unexpected troubles.
Confirm the presence of warranties and aftercare services
When choosing a solar installation contractor, check for warranties.
While solar panels and batteries come with manufacturer warranties, also confirm whether there is a construction warranty in case leaks occur after installation!
If the contractor offers a warranty period, they will respond free of charge in the event of leaks after installation.
Additionally, some contractors provide aftercare services separate from warranties, so be sure to check if the contractor you are considering has aftercare services available.
Since abnormalities or damage on the roof can be in hidden areas, you may not notice them yourself.
By conducting inspections during aftercare, hidden issues can be detected early, preventing major repairs or failures!
Kakeru Koumuten Co., Ltd. offers a leak warranty as part of the construction warranty for solar panel installations.
We also provide aftercare services and send out annual DM notifications!
Please check the DM, and if you wish, we will visit you for aftercare services!
Obtain estimates from multiple contractors (at least 3 companies)
When requesting solar panel installation, be sure to obtain estimates from multiple contractors.
Even if the same manufacturer is used for the same type of work, costs may vary, as well as warranties and after-sales services.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your desired repair contractor at a lower price, it is essential to obtain estimates from multiple contractors.
When comparing estimates, please check carefully:
“Verification of estimate items”
“Types of solar panels”
“Warranties and after-sales services”
Make sure to compare these details! If the quality of the materials is low or if steps are skipped, costs can be reduced, so avoid making decisions based solely on price!
Check if they provide support for subsidy applications
Subsidies are often available for the installation of solar panels and storage batteries, but there is a possibility that they may not be granted due to application errors.
If you proceed with the support of the contractor, there should be no issues with the application.
Make sure to apply for the subsidy before starting the construction and proceed with the work only after it has been accepted!
The flow will be that the subsidy will be decided and granted after the construction is completed!
Benefits of Introducing Solar Power Equipment
The benefits of installing solar panels are as follows!
Benefit 1: Economic Benefits
The biggest advantage of installing solar panels is the economic benefit!
Although the selling price of electricity has decreased compared to ten years ago, rising electricity costs allow you to benefit from consuming the electricity you generate!
Electricity prices are expected to continue rising, making it attractive to cover your consumption with solar power!
If you plan to use the generated electricity at night, installing a storage battery is essential!
Benefit 2: Subsidies can be utilized!
Subsidy conditions and amounts vary by prefecture and municipality, but there is a high probability that subsidy applications can be made!
Reducing the actual burden amount through subsidies is a significant advantage!
Benefit 3 Environmentally Friendly!
Solar power generation contributes to mitigating global warming by reducing carbon dioxide emissions and dependence on fossil fuels.
It is considered an environmentally friendly method of power generation since there is no noise or harmful substance emissions during the generation process.
Benefit 4: Improved Insulation Effect!!
By installing it on the roof or rooftop, insulation properties are enhanced.
Especially in summer, it can effectively block direct sunlight, providing significant heat insulation benefits!
Benefit 5: Electricity Use Possible Even During Power Outages!!
By installing a storage battery, it becomes possible to use electricity even during emergencies such as power outages!
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 may be incurred
The maintenance costs are related more to the roof where the solar panels are installed rather than the solar panels themselves.
If you perform roof renovations 10 to 20 years later, there will be costs for removing and reattaching the solar panels.
If the existing roof is deteriorating, it is reassuring to renovate it with durable roofing materials before installing the solar panels!
It would be comforting to ask for a simulation that considers maintenance costs before introducing solar panels!
Point 2: The risk of leaks may increase depending on the roofing material
Slate roofs and tile roofs require drilling holes to secure solar panels.
As a result, there is an inherent risk of leaks due to the holes made in the roof.
Of course, we will ensure proper waterproofing, but if you are concerned about making holes, one option is to replace the roofing material with a metal roof and secure the solar panels using the catch method.
Catch-type base hardware for horizontal metal roofs
Note 3: The roof will become heavier
With the addition of solar panels, the roof will become heavier. In the case of tile roofs, it may be reassuring to replace them with lighter roofing materials.
How to Choose Solar Panels?
There are many manufacturers of solar panels, and their output (power generation) and costs vary.
There is no definitive answer to “which manufacturer has the best solar panels”, and what is important is to choose solar panels that are suitable for your life plan and building!
Here are some points to consider when comparing solar panels!
Choosing Method 1: Compare based on total power generation of the roof
When installing solar panels on the roof, it is important to consider how much power can be generated in the limited area, and the more power generated, the better!
Solar panels come in various sizes depending on the manufacturer, and their power generation also differs.
For example, a 350W output panel and a 400W output panel may seem like 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,” leading to different installation capacities for the same roof due to the size difference.
400W × 15 panels = 6kW (total power output of the roof)
350W × 20 panels = 7kW (total power 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 just the output of a single panel!
Choosing Method 2: Compare based on degradation rate of solar panels
Solar panels have a degradation rate, and their power generation gradually decreases over 10 or 20 years.
After 30 years, some may see a 40% decrease in power generation, while others may only decrease by about 10%.
By considering the degradation rate along with the initial power generation, you can choose solar panels without regrets!
Choosing Method 3: Compare based on warranty period
There are several types of warranties for solar panels, including “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 provide a 10-year warranty, so it varies widely!
The longer the warranty, the better, so let’s check the warranties of the manufacturers you are considering!
If you are looking for a solar panel installation contractor in Musashino City, Tokyo, please consult Kakeru Koumuten Co., Ltd.
Our company handles a wide range of exterior renovations, including solar panels, roof work, and exterior wall work in Musashino City, Tokyo.
We have received many requests from customers, including renovation companies and real estate agencies, who have contacted us!
Kakeru Koumuten Co., Ltd. promises “high-quality renovations at low cost”, and we have received positive feedback from numerous customers.
We continue to update our construction performance records every year, and we will strive to improve quality to satisfy even more customers in the future.
Our company can perform all exterior renovations, not only roof overlay and re-roofing work but also partial roof repairs, exterior painting, and exterior wall overlay methods.
We are also happy to assist with small jobs such as partial repairs and rain gutter cleaning!
In case of emergencies like leak repairs or situations where temporary measures can be taken without scaffolding, please consult us!
“I want to know 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 the customer’s position and will propose the optimal construction plan!
We are confident that we will not be outdone by other companies in terms of cost, quality, and organization for exterior work!
We welcome competitive estimates with confidence!
Estimates are completely free, and if you find our company to be inferior to others, feel free to decline!
Characteristics of Musashino City, Tokyo
Musashino City is located on the western side of central Tokyo, a city with excellent access to the city center while preserving the rich nature of Musashino, making it a green and vibrant area. The city features calm residential neighborhoods and unique shopping streets, exuding a sophisticated atmosphere.
The climate is relatively mild, providing a gentle environment where you can enjoy the changes of the four seasons. In particular, the cherry blossoms in Inokashira Park in spring and the beautiful autumn foliage attract many visitors from both inside and outside the city.
Transportation access is also very convenient, with the JR Chuo Line and Keio Inokashira Line running through the area. It takes about 15 minutes from Kichijoji Station to Shinjuku Station and approximately 20 minutes to Shibuya Station, making it an ideal location for commuting to the city center.
One of the most famous tourist spots is “Inokashira Park,” where nature and culture coexist. The park features a pond, a zoo, and lush walking paths, making it a beloved place for relaxation. Additionally, the Kichijoji area is home to unique cafes, shops, and a vibrant shopping street, attracting a wide range of age groups. The city also boasts cultural facilities such as the “Musashino City Kichijoji Art Museum” and “Musashino Place.”
Our company handles a variety of exterior construction and solar power projects in Musashino City, Tokyo.
We are happy to assist with partial roof repairs such as roof overlay work, roof replacement, and leak repairs, as well as other repairs! Please feel free to consult us about any sudden troubles!
Service Areas in Musashino City, Tokyo
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and all of Tokyo.
List of Areas in Musashino City, Tokyo
Kichijoji Honcho, Musashino City / Kichijoji Higashicho, Musashino City / Kichijoji Minamicho, Musashino City / Kichijoji Kitacho, Musashino City / Sakainancho, Musashino City / Gotenyama, Musashino City / Sakai, Musashino City / Sakuradai, Musashino City / Sekimae, Musashino City / Nakacho, Musashino City / Nishikubo, Musashino City / Midoricho, Musashino City / Hachimancho, Musashino City
・Leave your exterior wall painting in Musashino, Tokyo to Kakeru Koumuten Co., Ltd.!
・Leave your roof renovation in Musashino, Tokyo to Kakeru Koumuten Co., Ltd.!
・Leave your exterior renovation in Musashino, Tokyo to Kakeru Koumuten Co., Ltd.!
・Kakeru Koumuten Co., Ltd.施工実績
・Kakeru Koumuten Co., Ltd. After Maintenance
・Kakeru Koumuten Co., Ltd.施工メニュー・料金表
・Kakeru Koumuten Co., Ltd. Staff Blog & Announcements
・Explaining the Importance of Comparing Estimates!
・Top 12 Solar Panel Manufacturers! Features and Selection Tips!
・What are the installation costs for solar power generation? Tips to Reduce Costs Explained!
・Where is the best place to install solar power generation? Points for Selecting Installation Locations!
・Check out our solar power generation estimates here!
We welcome inquiries via LINE as well◎
AAA is a young company with an average age in the early 20s, but our technology is second to none.
One of our greatest strengths is that we can do all of our own scaffolding, roofing, and painting work. In this industry, where work is generally divided, we are able to provide a complete set of services, which saves time and effort in management and reduces costs. Above all, if there is any trouble, we will come to you right away!
We can confidently declare this. We are the youngest and most friendly renovator in Kanagawa!







