Country Reports

In 2013, the Government of Japan reformulated and published The Second Basic Plan on Ocean Policy which states the importance to “realize a new oceanic state in harmony with the peaceful and positive development and use of the oceans with the conservation of the marine environment, under international cooperation based on the United Nations Convention on the Law of the Sea and other international agreements.”

This plan addresses the promotion and creation of marine industries and encourages the public and private sector to improve frameworks for the development of marine renewable energy in the country. It also remarks the need for the establishment of comprehensive strategies including policy support measures, under a coordinated approach between the industrial, academic and governmental sectors.


Ocean energy projects in Japan are supported by the New Energy and Industrial Technology Development (NEDO), by the Ministry of Environment (MOE) and by the Ministry of Education, Culture, Sports, Science and Technology (MEXT). NEDO has been encouraging R&D for wave energy, tidal energy, ocean current and ocean thermal energy conversion. Under a contract with NEDO, the IHI Corporation has been developing a floating ocean current technology, to use in ocean currents, such as the Kuroshio Current, along the coast of Japan.


A new test site has been approved for ocean current projects, at Kagoshima Prefecture. In this site, IHI Corporation tested their 1:3.5 scale floating ocean current demonstration project called "Kairyu" (a twin rotor 100 kW turbine), during 2017. There are plans for continuation and a 2 MW floating device has been designed to be deployed at 200 – 1000 meters water depth (50 meters below the water surface).

Mitsui Engineering and Shipbuilding entered into a lease agreement with Ocean Power Technologies for the installation and demonstration of a PB3 PowerBuoy. The wave energy convertor was deployed off Kozu island for extended testing during 2017.

Wave Energy Technology conducted demonstration trials on its scaled floating wave energy prototype off Kobe city in Japan. The 1.4 meters in diameter device demonstration was conducted and is leading towards the development of a up to 1.2MW commercial-scale unit.

Future projects include the MOE sponsored tidal turbine installation off the Goto Islands, Nagasaki Prefecture. A single Open Centre turbine supplied by Naval Energies is planned for deployment in 2019-2020 working in partnership with local partners Kyuden Mirai Energy Co., Inc, Nippon Steel & Sumikin Engineering Co., Ltd., and NPO Nagasaki Marine Industry Cluster Promotion Association.



Source: IHI Corporation and NEDO


67855-jp-2.jpg              PB3 PowerBuoy deployment                                            Wave Energy Technology deployment
         Source: Ocean Power Technologies, Inc.                                       Source: Wave Power Technology