Naru Strait Pilot

The Naru Strait is a tidal energy project in the waters of Goto City, Nagasaki Prefecture, Japan. In this pilot phase, a SAE AR500 turbine (500 kW) was installed over 5 days (including the cable lay) in January 2021 and operated for 11 months. This deployment produced 247 MWh of power with 97% availability and a 6.3% capacity factor. The turbine was cabled to shore but was not grid connected. By June 2021 the turbine system was recognized as an official power generation facility by the Ministry of Economy, Trade and Industry (METI), a key stakeholder in consenting renewable energy projects in Japan. The AR500 was recovered in December 2023. The Proteus Marine Renewables (PMR) operations team (formerly the tidal engineering arm of SIMEC Atlantis Energy), coupled with local support from Toyo Construction, Goto Transportation and Shibuya Diving, executed the retrieval of the turbine in two days. The recovery operations included the retrieval of the export cable dry mate connector, followed by the AR500 turbine itself using Proteus' in-house subsea handling equipment. The pilot was successful, and the AR500 turbine was upgraded by PMR for a MW scale project at the same location.

industrialnews.co.uk

Project Manager

Kyuden Mirai Energy Company Inc.

Additional Information

Project Website

Project Status Is the project actively being planned or is deployed in the water (active)? Or was the project canceled or completed (inactive)?

Inactive

Project Life Cycle Project Progress through life cycle:<ul> <li>Planned: Project has identified a deployment location and is preparing for deployment</li> <li>Operational: Project is deployed in the water and is active</li> <li>Completed: Project was previously deployed in the water</li> <li>Decommissioned: Installation has been fully removed in accordance with regulations</li> <li>Canceled: Project was canceled before being deployed in the water</li></ul>

Decommissioned

Max Rated Power Capacity The maximum amount of electricity that can be produced by project, based on available resources and device nameplate capacity.

0.5 MW

Operational Duration

January 2021 - November 2021

Project Duration

2019 - 2023

Energy Resource

Tidal

Project Scale

Full-scale

Number of Devices

1

Grid Connectivity

Not Grid Connected

Waterbody

Naru Strait, Japan

Site Characteristics Geographic characterization for the project location:<ul> <li>Open Ocean: Main body of ocean, not enclosed or partially enclosed by land</li> <li>Coastal: Open water near the coast, spanning between land and shelf boundary</li> <li>Enclosed Bay: water that is partially surrounded by land, with a mouth open to larger water</li> <li>Constricted Channel: A channel where water flows quickly due to narrowing by the land</li> <li>River: Water flowing from land towards a larger body of water</li></ul>

Constricted Channel

Country

Japan

Environmental Details

Tethys Metadata

Last Modified

25 June 2025

This Project has the following MRE Devices

Citation Formats

“Naru Strait Pilot.” Marine Energy Projects Database: Projects, PRIMRE, United States Department of Energy, https:https://openei.org/wiki/PRIMRE/Databases/Projects_Database/Projects/Naru_Strait_Pilot. Accessed <day> <monthRoman> <year>.

Marine Energy Projects Database: Projects. <year>. "Naru Strait Pilot." Accessed <monthRoman> <day>, <year>. https:https://openei.org/wiki/PRIMRE/Databases/Projects_Database/Projects/Naru_Strait_Pilot.

PRIMRE/Databases/Projects Database/Projects/Naru Strait Pilot

Naru Strait Pilot

This Project has the following MRE Devices

Filters:

Citation Formats