Coolnet Tokyo (Enhancement project to promote zero initial cost residential solar power generation)
Updated: July 2026, 5
table of contents
CoolNet Tokyo (Enhancement Project to Promote Zero Initial Costs for Residential Solar Power Generation) Subsidy Application Assistance Service
Service
This subsidy offers homeowners the advantage of installing equipment with zero initial cost and receiving a full refund of the grant. Businesses also benefit from this, as it makes it easier to propose their services to customers, leading to increased contract acquisition and business expansion.
Business period
From fiscal year 4 to fiscal year 12 (grant payments will continue until fiscal year 14)
budget amount
Approximately 110 billion yen
Deadline for application for issuance
Until one year after the date of signing the zero-initial-cost service contract, or until March 31, 13 (Monday), whichever comes first.
Projects eligible for subsidies
This service, which installs solar power generation systems and other related equipment with zero initial cost to homeowners, is a business plan registered with the Tokyo Metropolitan Environmental Public Corporation.
Grant recipients
Businesses that install solar power generation systems for homeowners with zero initial cost through leasing, electricity sales, roof leasing, and self-ownership models.
Fiscal year 8 application period
The information for fiscal year 2026 has not yet been updated.
The Reiwa 7 fiscal year ran from April 1, 2025 to March 31, 2026.
Subsidy amount (subsidy unit price)

Source: Coolnet Tokyo
Benefits of hiring us
Keeping up-to-date with the latest information on legal revisions, etc.
We have a system in place to quickly grasp and respond to the latest information that affects our business, including subsidy rules, local government regulations, and changes to related ordinances.
Thorough deadline management
We support schedule management to tight project completion deadlines, allowing employees to focus on their core business.
High-precision document creation and reduction of the risk of errors
We minimize the risk of rejection due to deficiencies by providing appropriate advice on tedious document creation, such as expense calculations and consistency checks of drawings and estimates.
Accurate consulting based on specialized knowledge
We provide optimal advice by leveraging our knowledge gained from understanding complex institutional rules and our past achievements.
Process to receive subsidy
The repair and diagnostic company will submit an application to our company (see the diagram below).
* If a subsidy application is handled by someone other than an administrative scrivener, it may be in violation of the law.


Reward table
We will inform you of the compensation for supporting your subsidy application, depending on the amount of the subsidy, as follows:
Calculation is based on a step-wise formula (excess progressive).
| Subsidy | Remuneration amount (tax included) |
|---|---|
| Less than 500 million | Subsidy amount x 14% ~ |
| 501 million to less than 1,000 million | Subsidy amount x 8% ~ |
| 1,001 million to less than 3,000 million | Subsidy amount x 4% ~ |
| 3,001 or more | Subsidy amount x 1%~ |
【One case】
In the case of a subsidy of 1,000 million yen
- 500 million yen x 14% = 70 yen
- 500 million yen x 8% = 40 yen
70 + 40 = 1,100,000 yen (tax included)
*Minimum remuneration: 200,000 yen (tax included)
*Depending on the number and content of your request, we may be able to offer a volume discount from the above amount.
*We will flexibly adjust support content (scope of support) and fees upon consultation.
Our support record
Our specialized team handles more than 2,500 subsidy applications a year and will support you according to your needs.
Additionally, if you have a large number of requests, we can also form a dedicated team.






