Technical FAQs 4

When will solar panels be required in Tokyo?

Starting April 2025, Tokyo will implement a new regulation requiring solar panels on newly constructed homes. What Is the Mandatory Solar Panel Installation? Starting in April 2025, Tokyo will require installing solar panels on all new residential buildings.

Where can I find information about solar power installation in Tokyo?

The Tokyo Metropolitan Government’s Bureau of Environment’s solar power portal site provides detailed explanations of not only the “subject of the mandatory installation,” but also the implementation date of the program (April 2025), “benefits of installing PV system,” “actual costs,” and other details.

What subsidies does Tokyo offer for solar panels?

Tokyo offers subsidies for solar panel installation, providing up to ¥120,000 per kilowatt (maximum ¥360,000). For panels exceeding 3.6 kilowatts, the subsidy is ¥100,000 per kilowatt. Additionally, Tokyo supports the “Tokyo Zero Emission Housing” initiative, promoting energy-efficient homes with improved insulation.

Is Tokyo's mandatory solar panel installation a step in the right direction?

“Tokyo’s mandatory solar panel installation for new buildings is a step in the right direction for promoting green energy,” said Masayuki Mae, an associate professor at the University of Tokyo, who specializes in energy-efficient housing.

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