This article introduces a project overview of the Chiba Kujukuri 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 | The project is currently under consideration by Eurus Energy Holdings and TEPCO Renewable Power. |
| Consortium Members | TBD |
| Location | Offshore Kujukuri, (Chiba) |
| Type | Fixed-bottom offshore wind power |
| WTG | TBD |
| Supply price | TBD |
| Capacity | Approx. 400 MW |
| Start of Construction | TBD |
| Operation Period | TBD |
2. Location and Site conditions
2-1. Wind Conditions
The wind speed within the zone is approximately 7.5–8.0 m/s (at 120 m altitude).
2-2. Water Depth
The water depth within the zone is mainly 20–30 m. Some areas with water depths exceeding 30 m are also present.
2-3. Seabed Conditions
TBD
2-4. Port Infrastructure
There are multiple fishing ports in the vicinity of the zone. The nearest port is Naarai Port.
3. Consortium Members
TBD
4. Project Implementation Structure
TBD
5. Project Schedule
5-1. Overall schedule
- December 15, 2025: 1st 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 |
|---|---|---|---|---|---|---|
| （仮称）九十九里沖洋上風力発電事業 Kujukuri Offshore Wind Power Generation Project | 株式会社ユーラスエナジーホールディングス Eurus Energy Holdings | 方法書 Method Statement | Up to 450MW | Up to 35 | 12 – 22MW | 2026/03/17 |
| （仮称）千葉県九十九里沖洋上風力発電事業 Chiba Prefecture Kujukuri Offshore Wind Power Generation Project | 東京電力リニューアブルパワー株式会社 TEPCO Renewable Power | 配慮書 Scoping Document | Up to 465MW | 24 – 31 | 15 – 20MW | 2024/04/09 |
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.
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