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.

Can solar panels be installed on new homes in Japan?

Solar panels on the roofs of homes in Hachioji, western Tokyo (Asahi Shimbun file photo) Japan’s first local regulation requiring solar panel installations on new single-family homes took effect on April 1 in Tokyo and Kawasaki in Kanagawa Prefecture.

Will Tokyo subsidize solar panels?

In March last year, the Tokyo Metropolitan Government established a 150 billion yen fund to subsidize the installation of solar power generation equipment for Tokyo residents. Subsidies will be provided if solar panels are installed during the construction of new eco-friendly houses or while retrofitting existing houses with 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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