“Offshore Wind Project Areas & Transmission Lines Map (beta version) ” is Now AvailableDevelopment Projects in Japan, Fishing Rights, Ports, Harbours, and Maps of Available Transmission Line Capacity Included

20 October 2022

in Japanese

Note: Technical issues have been resolved.   (29 Nov. 2022)

Renewable Energy Institute will start providing information on the “Offshore Wind (OSW) Project Areas & Transmission Lines Map (beta version*).”
* the pre-released beta version covers transmission line information for Aomori, Akita and Iwate prefectures.

The Vision for Offshore Wind Power Industry - Phase 1, which was announced by the Public-Private Council on Enhancement of Industrial Competitiveness for Offshore Wind Power Generation, states that the target is to form offshore wind projects of 10 GW by 2030 and 30-45 GW by 2040 in Japan. The first round of tenders under the Renewable Energy Sea Area Utilization Act has also been held, and development has begun in four sea areas. In addition, development is underway in six port areas, which, when combined, means that specific initiatives for installing offshore wind turbines are in progress in 10 sea areas in Japan. Environmental assessments, zoning and other measures for installing offshore wind power are ongoing in many sea areas.

The OSW Project Areas & Transmission Lines Map (beta version) provides information on the development status of offshore wind power in Japan in the form of a map in both Japanese and English. Information on transmission lines, ports, fishing rights, offshore distances and water depths, which are essential for development, can also be checked. The map will also include information on available capacity for power lines; the data for the whole country is scheduled to be completed by spring 2023.

The map will allow easier understanding of the development status of offshore wind power in Japan and related information. We hope many stakeholders will actively use this map as an essential reference for various studies and discussions.

Data Disclaimer

While we have used our reasonable efforts to ensure the latest accurate information available on the site, Renewable Energy Institute is however not responsible for its accuracy.  The data used on the map may be revised by data sources retroactively, and the data on the site may be revised accordingly.


You can use the downloaded figures and data freely. However, when citing, please use the credit notation in the following form:
Source: Renewable Energy Institute, "OSW Project Areas & Transmission Lines Map (beta version) " accessed on DDMMYYYY 

External Links

  • JCI 気候変動イニシアティブ
  • 自然エネルギー協議会
  • 指定都市 自然エネルギー協議会
  • irelp
  • 全球能源互联网发展合作组织

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