Leave your skylight repairs and replacements in Toshima-ku, Tokyo to Kakeru Koumuten Co., Ltd.!
If you are looking for
skylight construction contractors in
Toshima-ku, Tokyo,
Kakeru Koumuten Co., Ltd. handles everything from temporary scaffolding installation to
roof work and skylight construction with complete in-house execution.
We have received numerous requests for skylight repairs and replacements in Toshima-ku, Tokyo.
In case of emergencies such as leaks from skylights (top lights), we will respond quickly for repairs and
temporary measures.
“About subsidies available for skylight construction in Toshima-ku, Tokyo”
“About the costs of skylight repairs and replacements”
“Reasons why Kakeru Koumuten is chosen in Toshima-ku, Tokyo” and more
For customers living in Toshima-ku, Tokyo, who are considering skylight replacements,
this information will definitely be helpful, so please take a look!
To conclude, the most important thing when considering skylight construction is
“multiple estimates”!
Let’s obtain at least three estimates from skylight repair contractors covering Toshima-ku, Tokyo!
Reasons why Kakeru Koumuten is chosen for skylight construction in Toshima-ku, Tokyo

One reason why we are entrusted with skylight repairs in Toshima-ku, Tokyo is that
“being a roofing company in Tokyo” is one of the reasons, but
“our unique approach to skylight replacement work that cannot be imitated by other companies”
has received high praise from many customers.
“cost, quality, and plans” are our absolute strengths,
1. Equipment Specialized in Exterior Renovation
Kakeru Koumuten Co., Ltd. has prepared the following warehouses and material storage to provide low-cost, high-quality exterior renovations such as skylight construction.
We have established five bases for material storage and showrooms.
In-house Scaffolding Materials
We own the scaffolding materials necessary for temporary scaffolding required for skylight construction, allowing us to set up scaffolding in-house.
By performing scaffolding work with our own scaffolding team instead of outsourcing, we can cut costs on scaffolding work and respond quickly in emergencies.
We have scaffolding materials for approximately 50 single-family homes!
Storage of Materials in Our Large Warehouse
We store materials used for exterior renovations.
By ordering a large quantity of materials at once, we can purchase materials at a lower cost!
Additionally, we always have stock available, allowing us to respond quickly in emergencies!
In-house Waste Separation
During skylight construction, various waste materials such as roofing materials, glass, and wood are generated.
While most contractors dispose of them all together, we can significantly cut waste disposal costs by separating and recycling the waste materials.
Showroom Dedicated to Exterior Renovations
In our showroom, not only can you have meetings, but you can also
directly check the actual roofing materials and colors.
You can also perform color simulations for exterior painting and check heat insulation properties using a heat insulation testing machine!
2. Complete In-House Construction for Skylight Installation
One of Kakeru Koumuten’s major strengths is our complete in-house construction.
From inquiries to project completion, everything is handled by Kakeru Koumuten in a consistent manner, allowing us to keep costs down while providing high-quality skylight installation.
Additionally, one representative will handle everything from the estimate to project completion.
Since the person in charge does not change, whether it’s sales or construction management, smooth communication is possible.
We can handle everything from the installation of temporary scaffolding to exterior painting, roofing work, and exterior cover work completely in-house!
Skylight installation involves the process of dismantling or peeling off roofing materials, so by carrying it out simultaneously with roof replacement or cover work, you can significantly reduce costs!
3. Various Permits Obtained & Skilled Workers on Staff
We have obtained construction industry licenses and permits for industrial waste collection and transportation!
We have qualified professionals such as national certified sheet metal workers and painting technicians, and we are confident in our construction techniques.
We are also capable of handling large-scale roofing projects such as those for factories!
We have qualified asbestos supervisors and asbestos surveyors on staff, allowing us to handle asbestos-containing roofing materials and conduct preliminary surveys.
4. Warranty and Aftercare
The skylight replacement work comes with a warranty! Aftercare is available every year, and we send out notification DM each year.
5. Flexible and Prompt Response
Our company is equipped to handle various troubles and situations related to skylights.
Even if you cannot access the roof at high altitudes, we can utilize drones to assist you!
During rain leak investigations, we can also conduct surveys using a thermal imaging camera, which helps in identifying the cause of leaks!
We will respond according to your wishes.
We also accept emergency repairs for sudden leaks from skylights!
6. Human Resource Development
We are creating various roof models by ourselves to enhance our skills and conducting practical training.
Since different sites require various processing and techniques, we regularly provide skill enhancement education to ensure all staff can respond effectively.
Possible Subsidies and Grants for Skylight Construction in Toshima-ku, Tokyo
In Toshima-ku, Tokyo, there are potential subsidies available when carrying out skylight construction!
For more details, please contact our company or your local government!
Child-Rearing Green Housing Support Project
Eligible Participants
Households with children (households with children under 18) and young couples are the primary targets for new construction or purchase of energy-efficient homes, as well as energy-efficient renovations of existing homes. For new construction, the builder or purchaser is eligible, while for renovations, the contractor ordering the work is eligible for the subsidy.
Requirements
For new homes, it is necessary to meet high energy efficiency standards set by the government, such as exceeding ZEH standards. For renovations, the work must improve the energy efficiency of the home through insulation upgrades or the introduction of energy-saving equipment. In both cases, it is required to contract with a registered business and complete the work within the specified period.
Maximum Subsidy Amount
For new construction, the maximum subsidy per unit ranges from 400,000 yen to 1,600,000 yen depending on the performance classification of the home, while for renovations, the maximum subsidy per unit ranges from 400,000 yen to 600,000 yen based on the content of the work. In either case, even if multiple works are carried out, the total subsidy cannot exceed these maximum amounts.
Subsidy Rate
This program does not provide a subsidy based on a certain percentage of the construction cost; instead, a predetermined “fixed subsidy” is granted based on the content and performance classification of the work. Therefore, in effect, the government covers part of the construction costs.
For more details, please click here!
Advanced Window Renovation Project
Eligible Participants
Owners of existing homes (single-family homes and apartment buildings) who are carrying out insulation renovation work on windows and openings are eligible. The actual subsidy application process is carried out by registered “window renovation contractors” with the government, and the granted subsidies are fully refunded to the homeowners through discounts on construction costs.
Requirements
The eligible renovations include installing interior windows, replacing exterior windows, and glass replacements aimed at improving insulation performance in existing homes. It is necessary to use products that meet the insulation performance standards set by the government and to enter into a construction contract with a registered window renovation contractor. Additionally, the total subsidy amount must be 50,000 yen or more, and the work must start and be completed within the specified construction period.
Maximum Subsidy Amount
The maximum subsidy is 2 million yen per household. Even if multiple windows are renovated, the total subsidy that can be received for the same residence will be up to this maximum amount.
Subsidy Rate
The subsidy rate is approximately equivalent to half of the construction costs. The actual subsidy amount is set at a fixed rate based on the type of window (inner window, outer window, glass), size, and insulation performance category, resulting in a total that is about 50% of the construction costs.
For more details, please click here!
【Toshima Ward】FY 2025 Toshima Ward Eco Housing Promotion Subsidy
Toshima Ward is conducting a project to subsidize part of the costs for those who introduce new energy-saving equipment for residential use, considering CO2 reduction, which significantly impacts global warming, for the purpose of conserving the global environment.
◎ Toshima Ward Eco Housing Promotion Subsidy (for individual residences)
◎ Information on Toshima Ward Eco Housing Promotion Subsidy (PDF)
Skylight Repair and Replacement Price List
This is the warranty and cost for each skylight repair method!
| Renovation & Repair Methods | Warranty | Cost |
| Skylight Replacement & Cover (Using products from Velux Japan) |
Manufacturer’s warranty up to 20 years | Approximately 250,000 yen~ (Varies by method) |
| Skylight Glass Replacement | Construction warranty 3 years~ (Varies by method) |
Approximately 60,000 yen~ (Varies by method) |
| Skylight Leak Repair (Sealing & Waterproof Tape) |
None | Approximately 10,000 yen~ (Varies by method) |
| Skylight Metal Replacement | Construction Guarantee: 3 years and up (Varies by method) |
Approximately 60,000 yen and up (Varies by method) |
| Skylight Removal | Construction Guarantee: 3 years and up (Varies by method) |
Approximately 60,000 yen and up (Varies by method) |
※Costs and guarantee periods vary depending on the shape, quantity, condition of the substrate, whether it is a roof overlay or complete replacement, type of existing roofing material, and type of materials used.
If you would like a detailed estimate, please feel free to contact us!
Estimates are completely free of charge.
For information on the costs of Kakeru Koumuten’s skylight repair and replacement plans, click here!
Customer Testimonials
Advantages and Disadvantages of Skylights
Advantages of Skylights
High Light Transmission

First, the advantage of skylights is their high light transmission.
When natural light enters the room, it creates a sense of openness, making it feel more pleasant.
Energy Savings

This is related to the high light transmission, as having natural light allows for savings on electricity bills. Since you will use less electric lighting during the day, it is conducive to energy conservation.
Good Ventilation

By installing a skylight, you can open and close it, which improves ventilation.
Warm air rises, enhancing airflow as well.
High Privacy

In areas where houses are closely packed together, large windows can expose the interior of your home. In such cases, skylights are installed on the roof, ensuring your privacy is maintained.
Disadvantages of Skylights
Risk of Leaks

The biggest concern when installing a skylight is the risk of leaks. Since it involves opening up the roof, there is always some risk of water intrusion.
However, with proper installation and regular maintenance, the risk can be minimized significantly.
Regular Maintenance Required

Skylights need maintenance every 5 to 10 years to prevent leaks. While maintenance may seem bothersome, it is recommended to perform it regularly to avoid damage to the interior and wooden structures caused by leaks.
Noise from Rain

Since skylights are installed directly on the roof, the sound of raindrops hitting the glass can easily be transmitted indoors. This can be particularly noticeable during heavy rain or storms.
However, this is not strongly felt with all skylights. By choosing double-glazed glass or products with high sound insulation, the sound of rain can be reduced.
Examples of Skylight Repair Work
| Construction Details |
| Skylight Glass Replacement Work |
| New Materials Used |
| Double Glazing |
| Price Range |
| 50,000 – 100,000 yen |
| Construction Period |
| 1 Day |
| Background to the Construction |
| Due to cracks in the skylight glass, we received a request to replace the skylight glass along with the roof overlay work. |
Skylight Glass Replacement Work – Construction Procedure
1. Remove the surrounding materials of the skylight
First, we will remove the cover materials and securing materials around the skylight. These materials will be reused, so we will take them off carefully.
2. Protection
We will protect the area around the skylight indoors.
We will take measures to ensure that no debris falls inside.
3. Removal of Existing Glass
Next, after removing the cover materials, we will take out the existing glass.
4. Installation of New Glass
Once the existing glass is removed, we will install the new glass. We will carefully install it to avoid breaking the glass, just as we did during removal.
5. Waterproofing Treatment
When replacing the glass of the skylight, waterproofing treatment may be necessary.
We will perform waterproofing around the glass using butyl tape and other materials.
6. Restoration of Materials and Sealing
We will reattach the covers and fasteners that held the glass in place.
It is important to ensure that the installation method matches the type of skylight being used, as improper installation could lead to leaks. We will check that the fixtures are securely fastened.
We will perform waterproofing treatment around the frame with sealing.
How to Choose a Skylight Contractor
There are many skylight contractors in Tokyo, and you may be unsure which one to choose.
Therefore, when requesting skylight replacement work or leak repairs, please check the following 5 points.
● Have extensive experience in skylight work
● Confirm if they can also handle roofing work
● Check for warranties and aftercare services
● Obtain estimates from multiple contractors (at least 3 companies)
● Confirm if they perform roof renovations in-house
By confirming the above 5 points, you will be able to choose a reliable contractor.
Have Extensive Experience in Skylight Work
Skylight contractors often have websites showcasing their work experience.
Additionally, if they provide detailed explanations of repair work with photos, it can give you peace of mind as a reference when you request repairs.
If you are concerned about whether the contractor you are about to hire will respond properly, choose one with extensive repair experience.
It can also be effective to look at reviews of skylight contractors on Google and review sites!
If there are many negative reviews or no reviews at all, it may be wise to refrain from hiring them.
Kakeru Koumuten Co., Ltd. specializes in exterior work, so we receive many requests for skylight replacement work.
Confirm if They Can Handle Roofing Work
Since skylights are installed on roofs, roofing work is often involved as well.
If the contractor lacks knowledge about roofs or cannot handle roofing work, it could lead to leaks after installation or high construction costs, resulting in potential troubles.
Furthermore, since skylight replacement or removal may require partial dismantling of the roof or restoration, performing roof overlay work or re-roofing simultaneously can significantly reduce costs!
Our company specializes in roofing work, so we can propose the optimal plan tailored to your needs for roofing work associated with skylight installation.
Check for warranties and after-sales maintenance
When choosing a skylight contractor, make sure to check for warranties.
If a leak occurs after the skylight installation, having a leak warranty from the contractor ensures that repairs can be done at no cost, providing peace of mind!
Additionally, companies that offer a warranty demonstrate confidence in their work, which can serve as a criterion for selecting a contractor!
Warranty periods vary by contractor and the nature of the work, but typically range from 1 to 10 years.
Emergency repairs or partial fixes often do not come with a leak warranty.
Moreover, some contractors offer after-sales services in addition to warranties, so be sure to check if the contractor you are considering has warranties and after-sales services.
Kakeru Koumuten Co., Ltd. sends out annual DM for after-sales maintenance, allowing for yearly inspections.
We also provide free responses for simple repairs like partial sealing.
Obtain estimates from multiple contractors (at least 3)
When requesting skylight work, make sure to obtain estimates from multiple contractors.
Even for the same repair or replacement work, costs can vary between contractors, as can warranties and after-sales services.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your desired contractor at a lower price, obtaining estimates from multiple contractors is essential.
When comparing estimates, consider not just the costs, but also
“Items in the estimate”
“Materials and quality, such as glass”
“Confirmation of the process”
and make a detailed comparison! If the quality of auxiliary materials is low or if steps are skipped, costs can be reduced, so avoid making decisions based solely on price!
Confirm whether the work is done in-house
There are various construction methods for skylight repair plans, including full replacement, roof overlay (cover method), and partial repairs!
The plan details will vary depending on the actual state of deterioration and the customer’s wishes.
If you choose a contractor that completely outsources skylight repair work, they may lack knowledge and experience, leading to proposals for repairs in the wrong areas or unnecessary work. There may be cases where customers who want to keep costs down are suggested to replace the skylight instead of a partial repair that would suffice.
Additionally, requesting a subcontractor after an investigation incurs extra time and costs.
By having the knowledge and experience to perform the work in-house, we can provide responsible construction while keeping costs down.
Moreover, with contractors that outsource work, one of the disadvantages is that response times during emergencies or post-construction troubles can be significantly delayed.
If you are looking for a skylight replacement contractor in Toshima-ku, Tokyo, please contact Kakeru Koumuten Co., Ltd.
Our company handles many roofing and exterior painting projects in Toshima-ku, Tokyo. We are happy to assist with skylight replacements, roof overlays, roof replacements, exterior painting, exterior cladding replacements, leak repairs, and other partial roof repairs!
In urgent cases like leak repairs, we may also be able to provide emergency measures without scaffolding, so please feel free to consult with us!
For specific requests such as “I want it to last long with one renovation”, “I want to keep costs as low as possible”, or “I want to improve insulation performance because the room is hot”, we will provide the best solutions.
We perform all work from temporary scaffolding construction to roofing and exterior painting entirely in-house.
We are confident that we will not be outdone in terms of cost, quality, and organization compared to other companies for exterior work!
We welcome competitive estimates with confidence!
Exterior Renovation Service Areas
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and all of Tokyo.
Toshima-ku, Tokyo Area List
Ikebukuro, Toshima-ku, Tokyo / Ikebukuro Honcho, Toshima-ku, Tokyo / Kanamecho, Toshima-ku, Tokyo / Kamiikebukuro, Toshima-ku, Tokyo / Kita-Otsuka, Toshima-ku, Tokyo / Komagome, Toshima-ku, Tokyo / Sugamo, Toshima-ku, Tokyo / Senkawa, Toshima-ku, Tokyo / Zoshigaya, Toshima-ku, Tokyo / Takada, Toshima-ku, Tokyo / Takamatsu, Toshima-ku, Tokyo / Chihaya, Toshima-ku, Tokyo / Nagasaki, Toshima-ku, Tokyo / Nishi-Ikebukuro, Toshima-ku, Tokyo / Nishi-Sugamo, Toshima-ku, Tokyo / Higashi-Ikebukuro, Toshima-ku, Tokyo / Minami-Ikebukuro, Toshima-ku, Tokyo / Minami-Otsuka, Toshima-ku, Tokyo / Minami-Nagasaki, Toshima-ku, Tokyo / Mejiro, Toshima-ku, Tokyo
・Trust Kakeru Koumuten for exterior wall painting in Toshima, Tokyo!
・Trust Kakeru Koumuten for roof renovations in Toshima, Tokyo!
・Trust Kakeru Koumuten for exterior renovations in Toshima, Tokyo!
・Kakeru Koumuten Co., Ltd. project achievements
・Kakeru Koumuten Co., Ltd. aftercare services
・Kakeru Koumuten Co., Ltd. service menu and price list
・Kakeru Koumuten Co., Ltd. staff blog and announcements
・We explain the importance of getting multiple estimates and points to compare!
・Trust Kakeru Koumuten for leak repairs in Toshima, Tokyo!
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株式会社翔工務店へ
株式会社翔工務店は平均年齢20代後半の若い会社ですが、技術はどこにも負けていません。
いちばんの強みは、足場工事、屋根工事、塗装工事とすべて自社で行えること。一般には分業されるこの業界にあって、一式で頼めるので管理に手間がかからず、コストも抑えることが出来ます。何より、トラブルがあればすぐにかけつけます!
自信をもって、宣言できます。私たちは、神奈川で一番若くて親切なリフォーム屋です!




