Wind Farm Certification

Wind Farm Certification is covered as part of the project certification process and is carried out to ensure conformity with the safety regulations of the Electricity Business Act for ”Construction Plan Notification”. ClassNK evaluates the environmental conditions of the proposed installation site and assesses whether the strength and safety of the wind turbines and their support structures are suitable for the installation environment based on Japan-specific requirements.

Unauthorized use prohibited

ClassNK publishes the following documents for wind farm certification.

Documentation Document No. Document type
Wind Farm Certification Service Procedure NKRE-SP-0003
Edition: April 2023
Guidelines on the Use of Certification Documents and Symbols NKRE-AP-0001 PDF
Guidelines on Filings of Complaints and Objections NKRE-AP-0002 PDF
Application (Initial) RE-081-03 PDF Word
Application (Change) RE-081-04 PDF Word
Request for Quotation
- Onshore Wins Power Plant & Initial -
RE-081-05_R01 PDF Word
Registrations of Wind Farm Certification
  Onshore Wind Power Plant
  Offshore Wind Power Plant
Application for Plan Approval Status Service (NK-PASS) 〈Renewable Energy〉 PASS-APP-E PDF Word


NKRE-GL-WFC01 Wind Farm Certification, Onshore Wind Power Plant Edition

NKRE-GL-WFC01_Comparison table Comparison table between old and new that clearly shows the changes from the July 2021 version (October 2021 error correction edition).

Related Documents

RD2101_R02 ClassNK Wind Turbine Certification and Related Services [May 2024 Website public version]

NK-PASS Operation Manual (Renewable Energy) 12th edition

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: