Offshore Noshiro City, Mitane Town and Oga City in Akita is a designated Promotion Zone under Japan’s Renewable Sea Area Act, the law that sets out how sea areas are allocated for offshore wind. The developer selected in Round 1 withdrew in August 2025, so the zone is now waiting for a re-tender. The government opened information submissions for the re-tender on 26 November 2025, and the statutory council revised its consolidated opinion the same month. The timing and terms of the re-tender have not been published (as of October 2026).
This page tracks where the zone stands in the process and what gets decided next, using primary sources. It is updated monthly.
1. Where Noshiro, Mitane and Oga Stands (October 2026)
| Status | Promotion Zone (designated 21 July 2020) |
|---|---|
| Foundation | Fixed-bottom |
| Tender round | Awarded in Round 1; developer withdrew in August 2025. Re-tender timing not published |
| Developer | None (awaiting re-tender) |
| EIA | Only the withdrawn developer’s scoping document remains. No new filing |
| Next steps | Publication of the re-tender guidelines, the document that sets the selection rules |
| Round 1 record | Akita Noshiro Mitane Oga Offshore Wind LLC (Mitsubishi Corporation Offshore Wind, CTECH, Mitsubishi Corporation); JPY 13.26/kWh; 494MW (38 × 13MW); planned COD December 2028 |
2. From Designation to Re-tender: Timeline
| Date | Event | Source |
|---|---|---|
| Jul 2020 | Designated as a Promotion Zone | METI |
| Dec 2021 | Round 1 awards Akita Noshiro Mitane Oga Offshore Wind LLC at JPY 13.26/kWh | METI |
| Aug 2025 | Selected developer announces withdrawal | METI |
| 26 Nov 2025 | Government opens information submissions from developers ahead of the re-tender | METI |
| Nov 2025 | 7th statutory council, the forum where national and local government, municipalities and fishers agree how the area is used revises its consolidated opinion | METI |
| Dec 2025 | METI and MLIT publish their analysis of the Round 1 withdrawals | METI, MLIT |
The withdrawal followed a low winning price in 2021 and the rise in material costs and interest rates that came after. See 👉 Why Japan’s Offshore Wind Round 1 Ended in Withdrawal.
3. EIA Status: No New Filing Yet
Japan’s environmental impact assessment runs in four stages: a primary document, a scoping document, a draft report with survey and prediction results, and a final report. For this zone, only the withdrawn developer’s scoping document remains, and no new procedure has been filed for the re-tender. In Choshi, which also lost its Round 1 developer, TEPCO Renewable Power filed a new primary document in August 2026.
| Project | Developer | Stage | Notice |
|---|---|---|---|
| Noshiro, Mitane and Oga offshore wind (provisional) | Akita Noshiro Mitane Oga Offshore Wind LLC | Scoping document (developer withdrew Aug 2025) | 2022/06 |
4. Site Conditions
A Sea of Japan site under 30m deep, suited to fixed-bottom foundations. The Round 1 plan used Noshiro Port for both construction and operations and maintenance.
For a cost comparison with other zones on the same assumptions, see 👉 Cost Realities of Japan’s Offshore Wind: LCOE and IRR.
What to Watch Next
- When the re-tender guidelines are published. Information submissions opened on the same day as for Yurihonjo and Choshi, so the three zones are likely to move as a group.
- The conditions in the revised council opinion. Fisheries coexistence and local benefit conditions feed into the re-tender requirements.
- Whether a new EIA filing appears. Any developer preparing for the re-tender would start with a primary document.
Related DeepWind Articles
- Japan’s Offshore Wind Promotion Zones: A Complete Project List
- Why Japan’s Offshore Wind Round 1 Ended in Withdrawal
- Japan’s Offshore Wind Promotion Zone Guideline Revision (March 2026)
Free reportWhich of April’s planning assumptions no longer hold? Our 17-page review of Japan’s offshore wind market, April to September 2026. Free when you subscribe to the Weekly. See what’s inside →