Hokkaido Ishikari Offshore Wind Project

The Hokkaido Ishikari Offshore Wind Power Project has been designated as a promising zone. We will update the information as it becomes available.

Other “Promising Zones” can be found in Japan’s Offshore Wind “Promising Zone” Projects — Candidate Areas for Auctions.

1. Project Overview

Project name	TBD
Developer	11 developers are under EIA process
Consortium Members	TBD
Location	Offshore Ishikari, Hokkaido
Type	Fixed-bottom offshore wind power
WTG	15 – 20MW
Supply price	TBD
Capacity	Approx. 91–114 MW
Start of Construction	TBD
Operation Period	TBD

2. Location and Site conditions

2-1. Sea & Geographical Features

The offshore area of Ishikari City, Hokkaido, at water depths of 20–50 m, has been designated as a promising zone.

Areas with average wind speeds of 7.0–8.0 m/s (at 100 m altitude) have been designated as promising zones.

2-2. Port Infrastructure & Grid Connection

Ishikari Bay New Port, located in close proximity to the promising zone, is expected to serve as the designated utilization port.

3. Consortium Members

TBD

4. Project Implementation Structure

TBD

5. Project Schedule

5-1. Overall schedule

• August 26, 2026: First statutory council meeting held.

5-2. EIA status

事業名称 Project name	事業者名 Developer	手続段階 EIA Stage	容量 Capacity	基数 Turbines	出力 Rating	更新日 Last Updated
（仮称）石狩湾洋上風力発電事業 Ishikari Bay Offshore Wind Power Project	シーアイ北海道合同会社 CI Hokkaido GK	配慮書 Scoping Document	Up to 1000MW	Up to 200	5 – 15MW	2026/01/27
（仮称）石狩湾オフショアウィンドファーム Ishikari Bay Offshore Wind Farm	ジャパン・リニューアブル・エナジー株式会社 Japan Renewable Energy Corporation	配慮書 Scoping Document	Up to 1000MW	15 – 25	9.5 – 14MW	2026/01/07
（仮称）石狩市沿岸洋上風力発電事業 Ishikari Bay Offshore Wind Power Project	石狩湾洋上風力発電合同会社 Ishikari Bay Offshore Wind Power GK	配慮書 Scoping Document	Up to 1032MW	Up to 108	9.5 – 20MW	2026/01/07
（仮称）北海道石狩湾沖洋上風力発電事業 Hokkaido Ishikari Bay Offshore Wind Power Project	コスモエコパワー株式会社 Cosmo Eco Power Co., Ltd.	配慮書 Scoping Document	Up to 1000MW	Up to 125	9.5 – 12MW	2025/05/27
（仮称）石狩・厚田洋上風力発電事業 Ishikari–Atsuta Offshore Wind Power Project	石狩湾洋上風力発電合同会社 Ishikari Bay Offshore Wind Power GK	配慮書 Scoping Document	Up to 1330MW	Up to 140	9.5 – 12MW	2025/05/27
（仮称）石狩湾沖洋上風力発電所建設計画 Ishikari Bay Offshore Wind Power Plant Construction Plan	株式会社JERA JERA Co., Inc.	配慮書 Scoping Document	Up to 522MW	Up to 65	9.5 – 14MW	2025/05/27
（仮称）石狩湾沖洋上風力発電事業 Ishikari Bay Offshore Wind Power Project	株式会社グリーンパワーインベストメント Green Power Investment Corporation	配慮書 Scoping Document	Up to 522MW	64 – 80	12 – 15MW	2025/05/27
（仮称）北海道石狩湾洋上風力発電事業 Hokkaido Ishikari Bay Offshore Wind Power Project	丸紅株式会社 Marubeni Corporation	配慮書 Scoping Document	Up to 1000MW	–	–	2025/05/27
（仮称）石狩湾洋上風力発電所 Ishikari Bay Offshore Wind Farm	日本風力開発株式会社 Japan Wind Development Co., Ltd.	配慮書 Scoping Document	Up to 3000MW	Up to 250	12MW	2025/05/27
（仮称）石狩市沖洋上風力発電事業 Ishikari City Offshore Wind Power Project	関西電力株式会社 Kansai Electric Power Co., Inc.	配慮書 Scoping Document	Up to 1785MW	119 – 130	12 – 15MW	2025/05/27
（仮称）北海道石狩市洋上風力発電事業 Hokkaido Ishikari City Offshore Wind Power Project	住友商事株式会社 Sumitomo Corporation	配慮書 Scoping Document	Up to 1000MW	50 – 67	15 – 20MW	2025/05/27

Summary

Other “Promising Zones” can be found in Japan’s Offshore Wind “Promising Zone” Projects — Candidate Areas for Auctions.

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