PROJECT Our Business

Chiba Choshi
Offshore Wind
Photo by courtesy of Choshi City

We are working on the development of Japan's first large-scale offshore wind farm in general sea areas off the coast of Choshi City, Chiba Prefecture, after the successful bidding in December 2021 by which we were selected as the developer and operator in accordance with the Act on Promoting the Utilization of Sea Areas for the Development of Marine Renewable Energy Power Generation Facilities.
This project will have 31 wind turbines installed with a power output of 13 MW (megawatts) each and in total 403 MW, which can supply power to about 280,000 households.
Currently, with the generous support from regional fishermen and other local stakeholders, we are conducting the preparatory works for the construction, such as seabed surveys, permit procedures including environmental impact assessments, and construction design, with the aim of starting operation in 2028.
In addition, we have started various initiatives in cooperation with local stakeholders for materializing non-temporary, sustainable and self-sustaining coexisting measures.

PROJECT OVERVIEW(PLANNED)

Name of Power Station
Chiba Choshi Offshore Wind Farm
Our Business
  • Power Generating Facility Fixed-bottom Offshore Wind Farm
  • Generation Capacity 403MW (13MW × 31)
  • Project Location Coastal and Offshore Areas of Choshi City,
    Chiba Prefecture(3,948.7ha)
Type of Foundation
Monopile
Annual Energy Production
Approx. 1,200GWh (estimated average)
Grid Connection Point
TEPCO Power Grid
Shin-Sawara Substation
Ports
Construction : Kashima Port / O&M : Naarai Port
Start of Construction
Onshore Construction : 2025
Offshore Construction : 2027
Operation Period
September 2028 – January 2052
Schedule
Award
2021
Development
  • Survey, Design & Procurement
  • Environmental Impact Assessment
  • Fishery Impact Assessment
Start of Construction (Planned)
2025
Construction
  • Onshore Construction
  • Offshore Foundation, Wind Turbine & Cable Laying
  • Creation of New Fishing Grounds
Start of Commercial Operation (Planned)
2028
Operation & Decommissioning
  • Operation and Maintenance
  • Further Development of Coexisting Measures
  • Decommissioning (Planned)
Contact