Japanese offshore wind hotspot urges government to relaunch tender quickly

Two of the offshore wind farm projects dropped by Mitsubishi were off Akita, and officials there want to see a rapid relaunch

Onshore wind turbines in Akita, Japan, looout to sea in a regions seen as ideal for offshore wind projects
Onshore wind turbines in Akita, Japan, looout to sea in a regions seen as ideal for offshore wind projectsPhoto: Satoshi Takahashi/LightRocket via Getty Images

One of Japan’s potentially leading regions for offshore wind power has reportedly urged authorities to relaunch a tender after Mitsubishi Corp withdrew from three developments due to rising costs.

Japanese officials had already said they will re-auction projects acquired by Mitsubishi-led consortium groups in Japan's first ever offshore wind round but no clear timeline has been set yet.

Two of the projects dropped by Mitsubishi were off the coast of Akita prefecture in western Japan with another off the Chiba prefecture, to the east of Tokyo.

Hitoshi Miura, director of clean energy policy for Akita prefecture, said the local economy was in urgent need of new investors for the projects that amounted to almost 1.8GW of development capacity, according to a report in Bloomberg.

“We were deeply shocked by the withdrawal,” said Miura, referring to Mitsubishi’s decision during a panel discussion Thursday at the Global Offshore Wind Summit in Akita.

Mitsubishi rescinded rights to develop and operate two sites in Akita and a third in Chiba prefecture after chief executive Katsuya Nakanishi claimed that construction costs had more than doubled since bids were placed.

Mitsubishi's decision drew criticism from some quarters on the grounds that the trading giant had misjudged the risks and bid too aggressively in a round that was concluded in 2021.

Mitsubishi's decision was also a blow to Japan’s plan to have 10GW of offshore wind power capacity installed by the end of the decade, rising to 30-45 GW by 2040.

The nation relies heavily on imports of liquefied natural gas for electricity and has emphasised the need to develop renewable energy projects to bring more clean power to the grid.

But the offshore wind industry has faced surging material costs, high interest rates and a depreciating Japanese currency.

Fourth wind tender

Japanese ambitions of achieving such a huge ramp-up in installed capacity by the end of the decade appeared to suffer another setback earlier this month when its next offshore wind auction — the country's fourth — was postponed.

Officials said the auction — which had been due to launch on 14 October — was merely being pushed back to allow the government to reassess market conditions and decide on its reform proposals.

Other speakers at the conference in Akita said the industry needs much stronger government support, especially to help ease financial pressures on developers, Bloomberg reported.

Delays to projects are making investors anxious about future opportunities, said Masaya Tajima, director for wind power energy for Hokkaido prefecture, another of Japan’s leading regions for the sector.

Other renewable energy developers like JERA Nex bp sounded more optimistic about the industry’s future. “There’s a perception that offshore wind power is dead,” Masato Yamada, the company’s senior vice president Japan, said at the event, “but the initiative hasn’t even truly begun.”

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Published 17 October 2025, 14:22Updated 17 October 2025, 14:22
JapanMitsubishiJERA Nex bp