Japan’s Organization for Cross-regional Coordination of Transmission Operators (OCCTO) has awarded 79 MW of solar capacity in the 27^th solar power auction, the fourth auction held in fiscal year 2025, with a weighted-average winning price of ¥4.61 (~$0.029)/kWh.

The auction was conducted for Feed-in Premium (FIP) solar power generation facilities with a capacity of 250 kW or higher under Japan’s renewable energy support framework. The auction had set a price cap of ¥8.68 (~$0.055)/kWh.

Eleven projects were selected through the auction process. The lowest successful bid price was ¥0.00/kWh, while the highest was ¥6.49 (~$0.041)/kWh.

According to OCCTO, 38 business plans were submitted for eligibility review prior to the bidding process, representing a combined generation capacity of 198.08 MW

Out of these, 37 applicants were notified of their eligibility to participate in the auction, representing a total capacity of 196 MW. A total of 23 bids were eventually submitted, covering a combined capacity of 162 MW. The weighted average bid price submitted by participants was ¥6.49 (~$0.041)/kWh.

In December 2025, OCCTO announced Japan’s 26^th solar power auction for projects of at least 250 kW, securing 75.4 MW from the original auctioned capacity of 163 MW.

The FIP program was introduced in 2022 to promote renewable energy by adding a premium to the market price of power generated from renewables.

Global solar installations hit a record high of 597 GW in 2024, a 33% increase year-over-year from 2023, according SolarPower Europe. Japan accounted for 1% of the total installations during the year.

In 2023, the government of Japan announced the results of the 18th utility-scale solar photovoltaic projects auction, allocating 105 MW to 33 successful bidders.

In the same year, OCCTO concluded the 17th auction for 69.07 MW of grid-connected solar power projects, announcing 55 successful bidders. The total bid capacity in the auction was 110.89 MW.