ClassNK Renewable Energy
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
Oct. 3, 2025
Registrations of Type Certification for Wind Farm updated (as of Sep 30, 2025)
Apr. 23, 2025
Registrations of Wind Turbine Certification updated (as of April 23, 2025)
Feb. 14, 2025
Registrations of Type Certification for Small Wind Turbine updated (as of February 14, 2025)
Feb. 15, 2024
Notice of The JAB Accreditation Symbol Renewal
NKRE-AP-0001 "Guidelines on the Use of Certification Documents and Symbols" is updated.
NKRE-AP-0001 "Guidelines on the Use of Certification Documents and Symbols" is updated.
Address and Contact Details
NIPPON KAIJI KYOKAI Renewable Energy Department
4-7 Kioi-cho, Chiyoda-ku, Tokyo 102-8567, Japan
Tel: +81-3-5226-2032
Fax: +81-3-5226-2060
email: re@classnk.or.jp
4-7 Kioi-cho, Chiyoda-ku, Tokyo 102-8567, Japan
Tel: +81-3-5226-2032
Fax: +81-3-5226-2060
email: re@classnk.or.jp