This article introduces a project overview of the Hokkaido Gan-wu Minami-goshi Offshore Wind, which has been designated as a “Promising Zone” under Japan’s Act on Promoting the Utilization of Sea Areas for the Development of Marine Renewable Energy as of October 2025.
The information will be updated as new details become available based on publicly accessible sources.
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 | TBD |
| Consortium Members | TBD |
| Location | Offshore Gan-wu Minami-goshi, (Hokkaido) |
| Type | Fixed-bottom offshore wind power |
| WTG | TBD |
| Supply price | TBD |
| Capacity | Approx. 560-710 MW |
| Start of Construction | TBD |
| Operation Period | TBD |
2. Location and Site conditions
2-1. Wind Conditions
The average wind speed within the promising zone is approximately 6.0–8.0 m/s (at 100 m altitude).
2-2. Water Depth
Within the promising zone, approximately 57% of the area has a water depth of 40 m or less, approximately 85% is 50 m or less, and approximately 98% is 60 m or less.
The deepest point within the zone reaches approximately 78 m.
2-3. Seabed Ground Conditions
Based on the results of SSS (side-scan sonar) and acoustic surveys, exposed bedrock has been confirmed in coastal areas. According to the SSS data, the area ratio of sandy mud zones to exposed rock zones is approximately 2:1.
2-4. Port Infrastructure
3. Consortium Members
TBD
4. Project Implementation Structure
TBD
5. Project Schedule
5-1. Overall schedule
- July 29, 2024: 1st Statutory Council Meeting
- November 28, 2024: 2nd Statutory Council Meeting
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 |
|---|---|---|---|---|---|---|
Source: Environmental Impact Assessment Case Information (Ministry of the Environment, Japan)
Summary
Other “Promising Zones” can be found in Japan’s Offshore Wind “Promising Zone” Projects — Candidate Areas for Auctions.
Explore more categories at DeepWind:
- 🔍Market Insights – Understand the latest trends and key topics in Japan’s offshore wind market
- 🏛️Policy & Regulations – Explore Japan’s legal frameworks, auction systems, and designated promotion zones.
- 🌊Projects – Get an overview of offshore wind projects across Japan’s coastal regions.
- 🛠️Technology & Innovation – Discover the latest technologies and innovations shaping Japan’s offshore wind sector.
- 💡Cost Analysis – Dive into Japan-specific LCOE insights and offshore wind cost structures.