Type Certification for Wind Turbines

Wind Turbines

ClassNK performs various evaluations for wind turbines based on related standards and technical requirements such as ”Design Evaluation” and “Prototype Certification for type testing”, finally issuing ”Type Certificate” the applicable standards have been satisfied.

Registrations of wind turbine certification


Unauthorized use prohibited

Small Wind Turbines

ClassNK performs evaluations for small wind turbine systems with an output of less than 20kW to ensure that they meet requirements specified in domestic and international standards established by IEC and JIS, issuing type certificates once it has confirmed conformity to the applicable standards.
ClassNK type certifications for small wind turbines also ensure eligibility for the Feed-in Tariff Scheme launched by the Japanese government as part of efforts to promote the use of renewable energy.


Unauthorized use prohibited

ClassNK publishes the following documents for type certification of small wind turbines.

Documentation Document No. Document type
Guidelines on Small Wind Turbine Type Certification RE-6 PDF
Guidelines on the Use of Certification Documents and Symbols RE-4 PDF
Guidelines on Filings of Complaints and Objections RE-5 PDF
Application for small wind turbine type certification (Initial) RE-071-26 PDF Word
Application for small wind turbine type certification (Renewal) RE-071-33 PDF Word
Application for small wind turbine type certification (Surveillance) RE-071-34 PDF Word
Application for small wind turbine type certification (Change) RE-071-36 PDF Word
Application for small wind turbine type certification (Occasional Surveillance) RE-071-39 PDF Word
Application for Issuance of ClassNK Certification Seals RE-071-11 PDF Word
Application for Issuance of ClassNK Certification Mark RE-071-15 PDF Word
Application for Issuance of JAB Accreditation Mark RE-071-17 PDF Word
Request for Quotation for small wind turbine type certification RE-071-19 PDF Word
Registrations of Wind Turbine Type Certification RE-071-03 PDF

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