If you are looking for a roof repair contractor in Shinjuku, Tokyo, come to Kakeru Koumuten
Kakeru Koumuten is an exterior renovation company specializing in roof repairs and leak repairs.
We have handled numerous leak repairs and roof repairs in Shinjuku, Tokyo.
If you are considering a roof renovation, please consult with Kakeru Koumuten!
We respond widely to sudden leaks after typhoons and roof repairs based on the age of the building.
For those in need in Shinjuku, Tokyo,
we can respond as soon as the same day, so feel free to contact us.
How to Choose a Leak Repair Contractor
There are many contractors for leak repairs in Shinjuku, and you may be unsure which one to choose.
Therefore, when requesting roof repairs and leak repairs, let’s check the following four points.
● Have extensive experience in roof repairs and leak repairs
● Confirm the presence of warranties and aftercare services
● Obtain estimates from multiple contractors (at least three)
● Check if they conduct leak investigations and roof repairs in-house
By confirming the above four points, you will be able to choose a reliable contractor.
Extensive Experience in Roof Repair and Leak Repair
Roof repair contractors often have websites that showcase their project achievements.
These project achievements may explain the following items, so check if they have performed repairs similar to your home.
Repair details,the background leading to the repair,materials used,repair costs,repair duration, etc.
Additionally, if the repair details are explained in detail with photos, it provides reassurance as a reference when you actually request repairs.
If you are concerned about whether the contractor you are about to hire will respond properly, choose a contractor with extensive repair experience.
Kakeru Koumuten Co., Ltd. specializes in roof and exterior repairs, so we receive many requests for leak repairs.
Examples of Roof Repairs by Kakeru Koumuten Co., Ltd. in Shinjuku-ku
Our Proposal
This time, you requested a roof inspection, and since the existing roofing material was in good condition, we proposed using the roof overlay (cover method) to keep costs down.
Additionally, for the roofing material, we recommended the highly durable and insulated 【Aijii Industry/Super Galtect】.
Check for Warranty and After-Service
When choosing a leak repair contractor, make sure to check for warranty availability.
Leak repairs can recur even after being fixed once, so if you have to request repairs every time a leak reappears, it can lead to significant expenses.
For this reason, contractors that offer a warranty may provide free repairs within the warranty period.
The warranty period varies by contractor and type of work, but it typically ranges from 1 to 10 years.
Emergency repairs or partial fixes often do not come with a leak warranty.
Additionally, some contractors offer after-service separate from the warranty, so be sure to check if the contractor you are considering has warranty andafter-service.
Kakeru Koumuten Co., Ltd. provides a leak warranty for both roof overlay and roof replacement work.
Similarly, exterior wall cover work, replacement work, and joint sealing work also come with a leak warranty.
As part of our after-service, we send out annual direct mail, allowing for yearly inspections.
Obtain Estimates from Multiple Contractors (at least 3 companies)
When requesting roof renovations or leak repairs, be sure to obtain estimates from multiple contractors.
Even for the same repair work, the costs may vary between contractors, and the warranties and after-services may differ as well.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your desired repair contractor at a lower cost, it is essential to get estimates from several contractors.
If a leak occurs, it’s understandable to feel rushed, but
first, perform temporary measures, and if you proceed with construction, taking your time to consider will lead to a regret-free project!
Kakeru Koumuten Co., Ltd. is happy to assist with temporary measures for leaks!
Check if the company conducts leak investigations and roof repairs in-house
Leaks can sometimes be quickly identified, while in other cases, it may take time to pinpoint the source, requiring knowledge and experience.
Contractors that completely outsource roof repairs and leak repairs to subcontractors may lack the necessary knowledge and experience, leading to suggestions for repairs in the wrong areas or ineffective leak repairs.
Moreover, having to investigate and then request a subcontractor adds extra time and costs.
By having the knowledge and experience to perform the work in-house, responsible and cost-effective leak repairs can be completed quickly.
Kakeru Koumuten Co., Ltd. conducts everything from leak investigations to construction in-house!
About the costs of leak repair construction
The table below shows the average costs for areas prone to leaks.
|
Repair Details |
Average Cost |
|
Replacement of part of roofing material |
¥10,000 – ¥20,000 |
|
Roof replacement (re-roofing) |
From ¥500,000 |
|
Roof overlay (cover method) |
From ¥400,000 |
|
Replacement/repair of roof ridge metal |
From ¥10,000 |
|
Skylight repair |
From 10,000 yen |
|
Repair of exterior walls and joints |
From 10,000 yen |
|
Repair of coping metal |
From 10,000 yen |
|
Waterproofing work for balconies and rooftops |
From 80,000 yen |
For detailed pricing, click here!!
About Kakeru Koumuten
Kakeru Koumuten Co., Ltd. is a remodeling company based in Aoba-ku, Yokohama, Kanagawa Prefecture, specializing in roofing, painting, and scaffolding work with complete in-house construction.
Since we can assemble temporary scaffolding and perform roof repairs in-house,
we can provide quick leak repairs at a reduced cost.
Company Introduction


● We store scaffolding materials!
Since we can set up temporary scaffolding ourselves, we can perform roof repairs quickly.


● We store materials and tools related to roofing and painting work!
We have all the necessary components for leak repairs, allowing us to respond quickly!
Customer Reviews
Service Areas
Kakeru Koumuten accepts requests throughout Kanagawa Prefecture and all of Tokyo.
Contact page for Kakeru Koumuten Co., Ltd. is here!
Shinjuku-ku, TokyoArea List
Aizumicho, Shinjuku-ku / Akagishitamachi, Shinjuku-ku / Akagimotomachi, Shinjuku-ku / Agabacho, Shinjuku-ku / Arakicho, Shinjuku-ku / Ichigaya Kagacho, Shinjuku-ku / Ichigaya Kooramachi, Shinjuku-ku / Ichigaya Sadobara-machi, Shinjuku-ku / Ichigaya Sanao-machi, Shinjuku-ku / Ichigaya Takashou-machi, Shinjuku-ku / Ichigaya Tamachi, Shinjuku-ku / Ichigaya Daimachi, Shinjuku-ku / Ichigaya Chounenji-machi, Shinjuku-ku / Ichigaya Nakanomachi, Shinjuku-ku / Ichigaya Hachiman-machi, Shinjuku-ku / Ichigaya Funakawara-machi, Shinjuku-ku / Ichigaya Motomura-machi, Shinjuku-ku / Ichigaya Yakuouji-machi, Shinjuku-ku / Ichigaya Yanagimachi, Shinjuku-ku / Ichigaya Yamanobori-machi, Shinjuku-ku / Iwatomachi, Shinjuku-ku / Enokimachi, Shinjuku-ku / Okubo, Shinjuku-ku / Kaidai-machi, Shinjuku-ku / Kagurakawagashi, Shinjuku-ku / Kagurazaka, Shinjuku-ku / Kasumigaoka-machi, Shinjuku-ku / Katamachi, Shinjuku-ku / Kabukicho, Shinjuku-ku / Kamiochiai, Shinjuku-ku / Kawadacho, Shinjuku-ku / Kikui-machi, Shinjuku-ku / Kitashinjuku, Shinjuku-ku / Kitamachi, Shinjuku-ku / Kitayamabushi-machi, Shinjuku-ku / Saikucho, Shinjuku-ku / Samon-machi, Shinjuku-ku / Shinano-machi, Shinjuku-ku / Shimoochiai, Shinjuku-ku / Shimomiyahicho, Shinjuku-ku / Shirogane-machi, Shinjuku-ku / Shinogawa-machi, Shinjuku-ku / Shinjuku, Shinjuku-ku / Suido-machi, Shinjuku-ku / Sugacho, Shinjuku-ku / Sumiyoshi-machi, Shinjuku-ku / Daikyo-machi, Shinjuku-ku / Takadanobaba, Shinjuku-ku / Tansu-machi, Shinjuku-ku / Tsukijimachi, Shinjuku-ku / Tsukudo-machi, Shinjuku-ku / Chikudo Hachiman-machi, Shinjuku-ku / Tenjinmachi, Shinjuku-ku / Tozuka-machi, Shinjuku-ku / Fukuchicho, Shinjuku-ku / Toyama, Shinjuku-ku / Naito-machi, Shinjuku-ku / Nakai, Shinjuku-ku / Nakaochiai, Shinjuku-ku / Nakasato-machi, Shinjuku-ku / Nakamachi, Shinjuku-ku / Nando-machi, Shinjuku-ku / Nishiochiai, Shinjuku-ku / Nishigoken-machi, Shinjuku-ku / Nishi Shinjuku, Shinjuku-ku / Nijukicho, Shinjuku-ku / Nishiwaseda, Shinjuku-ku / Babashimo-machi, Shinjuku-ku / Harikata-machi, Shinjuku-ku / Haramachi, Shinjuku-ku / Higashi Enokimachi, Shinjuku-ku / Higashi Goken-machi, Shinjuku-ku / Hyakunincho, Shinjuku-ku / Fukuro-machi, Shinjuku-ku / Funamachi, Shinjuku-ku / Bentenmachi, Shinjuku-ku / Minami Enokimachi, Shinjuku-ku / Minamimachi, Shinjuku-ku / Minamimoto-machi, Shinjuku-ku / Minamiyamabushi-machi, Shinjuku-ku / Yamabuki-machi, Shinjuku-ku / Yaraimachi, Shinjuku-ku / Yokodera-machi, Shinjuku-ku / Yochomachi, Shinjuku-ku / Yotsuya, Shinjuku-ku / Yotsuya Sakamachi, Shinjuku-ku / Yotsuya San’ei-machi, Shinjuku-ku / Yotsuya Honshio-machi, Shinjuku-ku / Wakaba, Shinjuku-ku / Wakamatsu-machi, Shinjuku-ku / Wakamiya-machi, Shinjuku-ku / Waseda Tsurumaki-machi, Shinjuku-ku / Waseda Minamimachi, Shinjuku-ku / Waseda-machi
Subsidies and Grants for Roof Leak Repairs in Shinjuku-ku, Tokyo
In Shinjuku-ku, Tokyo, the following subsidies may be available for roof leak repairs. For details, please contact our company or your local government. (As of February 2025)
Subsidy for Seismic Renovation Work
Eligible Projects
Wooden houses and mixed-use buildings with two stories or less that commenced construction before May 31, 1981 (Showa 56)
Wooden houses and mixed-use buildings using traditional frame construction that commenced construction from June 1, 1981 (Showa 56) to May 31, 2000 (Heisei 12)
Amount of Subsidy
|
[Seismic Renovation Work] If seismic renovation work is carried out to achieve a structural evaluation score of 1.0 or higher
|
3/4 of the eligible construction costs
(Maximum amount: 3 million yen)
|
||||
|
[Simple Renovation Work] If seismic retrofitting work is carried out to achieve a structural evaluation score of 0.7 or more but less than 1.0 |
3/5 of the eligible construction cost (upper limit of 1.5 million yen) |
||||
Those who meet the above criteria may be eligible for subsidies.
Summary
Our company handles many roofing projects in Shinjuku-ku.
We are happy to assist with partial roof repairs such as roof overlay work, roof replacement, and leak repairs, as well as other repairs!
“I just need a temporary fix for the leak”
“I want to repair my broken roof”
“I want to implement overall leak prevention measures for the building”
We will provide the best solutions for your specific requests.
Estimates and inspections are, of course, free!
We carry out everything from temporary scaffolding work to roofing and exterior painting completely in-house.
We are confident that we will not be outdone by other companies in terms of cost, quality, and efficiency in exterior work!
We welcome competitive estimates with confidence!
We look forward to your inquiries. Thank you very much.
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!




