ClassNK Renewable Energy

Renewable Energy Image

In order to support the industry's growing needs for renewable energy technologies, ClassNK provides certification and a third-party verification services of diverse renewable energy facilities. ClassNK is contributing towards the creation of low carbon societies both in Japan and abroad through these services.

What's New
Jul. 4, 2024
Registrations of Type Certification for Small Wind Turbine updated (as of July 4, 2024)
Jul. 4, 2024
Registration of Wind Farm Certification updated (as of June 30, 2024)
Jun. 13, 2024
Registrations of Wind Turbine Certification updated (as of June 13, 2024)
May. 27, 2024
RD2101_02 ClassNK Wind Turbine Certification and Related Services [May 2024 Website public version] is updated.
Feb. 15, 2024
Notice of The JAB Accreditation Symbol Renewal
NKRE-AP-0001 "Guidelines on the Use of Certification Documents and Symbols“ is updated.
Aug. 17, 2023
NKRE-GL-WFC01 Guideline “Wind Farm Certification, Onshore Wind Power Plant Edition” and Comparison table are updated.
Jun 28, 2023
Technical Services for Renewables and Environment is newly added to service items.

Address and Contact Details

Renewable Energy Department
4-7 Kioi-cho, Chiyoda-ku, Tokyo 102-8567, Japan
Tel: +81-3-5226-2032 Fax: +81-3-5226-2060 email: