Tokyo Trains Switch to 98 MW of New Solar Power

Millions of daily commuters in Tokyo will soon ride trains powered by brand new solar farms, thanks to a groundbreaking clean energy deal announced by Tokyu Railway.

The major rail operator will source electricity from 98 megawatts of newly constructed solar plants across Japan, with power delivery beginning in 2026 and continuing for 25 years. This represents the highest adoption ratio of new renewable energy among Japan's major private railway operators.

The solar plants will power seven busy train lines threading through the Tokyo metropolitan area, including the Toyoko, Meguro, and Den-en-toshi lines that carry hundreds of thousands of passengers daily. Multiple development companies backed by Tokyu Corp. and partners will build the facilities at sites throughout the country.

By 2028, about 30% of the railway's annual power consumption, roughly 110 million kilowatt hours, will come from these newly developed solar assets. The plants will come online in phases between April 2026 and the end of fiscal year 2027.

Tokyu Railway already runs all its train lines on 100% renewable electricity as of 2022, but those were purchased through retail electricity products. This new corporate power purchase agreement takes things further by actually creating new renewable capacity rather than just buying existing green power.

The Ripple Effect

This deal reflects a bigger transformation happening across Japan's corporate energy landscape. The country's corporate renewable power market has exploded from niche to mainstream, with over 500 publicly disclosed deals and more than 2.5 gigawatts of capacity by 2025.

High fossil fuel import costs and mounting pressure to decarbonize are pushing Japanese companies toward long-term clean energy procurement. Japan's shift away from feed-in tariff subsidies toward market-based mechanisms is accelerating the trend, making corporate solar deals more attractive than ever.

Other Japanese rail operators are getting creative with renewables too. Central Japan Railway and Sekisui Chemical announced plans in January to pilot flexible perovskite solar panels on Tokaido Shinkansen noise barriers, showing how railways can generate power directly from their infrastructure.

Tokyu Group and Tohoku Electric Power, which will jointly manage the electricity supply, plan to expand their collaboration on solar development and battery storage to support even more renewable energy growth across Japan.

Daily train commutes are about to get a whole lot greener.