The Tokyo Metropolitan Government has set a target of “approximately 1 GW installed within the metropolitan area by 2035” to promote the widespread adoption of “Air Solar” ^[Note], a Japanese-developed solar cell characterized by being “thin, light, and flexible.”
Starting in fiscal year Reiwa 8, the government will begin providing new subsidies to wards, cities, towns, and villages for the installation of “Air Solar” systems at evacuation facilities.

[Note] Air Solar is a solar cell that utilizes a crystal structure known as perovskite.
Compared to silicon-based solar cells, it has the following characteristics and is expected to be highly competitive with silicon-based solar cells.

• 1) Because it is “thin, light, and flexible,” it can be installed in a wider range of locations.
• 2) The development of manufacturing technologies could lead to mass production and lower manufacturing costs.
• 3) Not only is this technology Japanese in origin, but approximately 30 percent of the world’s total production of iodine—the main raw material—is produced in Japan.

Eligible Businesses for Grants

Special wards, cities, towns, and villages within Tokyo, partial-affairs associations, and wide-area unions.
An entity that implements a subsidized project jointly with a municipality or similar body.

Grant Amount

Three-quarters of the eligible expenses related to the installation of Air Solar (survey and design costs, equipment costs, and construction costs)
(maximum amount: 30 million yen)

Main Eligibility Requirements

• Install an Air Solar system that meets the requirements (see the project website for details on the requirements)
• Ability to provide information regarding business operations, power generation volume, and other related matters
• To disseminate information regarding the implementation of the program in coordination with the metropolitan government

Application Period

From Thursday, September 17, Reiwa 8, to Wednesday, March 31, Reiwa 9 (the program will end once the total amount of applications reaches the budgeted amount)

Project Period

Reiwa 8 and Reiwa 9 (Reiwa 9 will consist solely of grant disbursements)

Budget Amount

36 million yen

Application Submission Desk

Tokyo Metropolitan Environment Public Corporation (Public Interest Incorporated Foundation) / Tokyo Metropolitan Center for the Promotion of Global Warming Prevention Activities (Cool Net Tokyo)

Business Website

Business Website (Link to an external site)

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This initiative is part of the efforts to advance the “Tokyo 2050 Strategy.”
Strategy 20: Zero Emissions—“Making Renewable Energy the Backbone of the Energy System”

Contact: (Regarding the Grant Program) Planning Division, Climate Change Countermeasures Department, Bureau of the Environment Phone: 03-5388-3524 (Regarding Application Submission) Tokyo Metropolitan Environmental Public Corporation, Tokyo Center for the Promotion of Global Warming Prevention Activities (Cool Net Tokyo) Phone: 03-5990-5067