Wind Farm Certification
ClassNK conduct certification to evaluate the environmental conditions of sites for wind farm construction and to verify that, based on those environmental conditions, the strength and safety of wind turbines and their support structures are ensured in the design.
ClassNK is accredited by the Japan Accreditation Board as a product certification body complying with JIS Q 17065:2012 (ISO/IEC 17065:2012) for wind turbine certification and wind farm certification.
ClassNK conduct certification to evaluate the environmental conditions of sites for wind farm construction and to verify that, based on those environmental conditions, the strength and safety of wind turbines and their support structures are ensured in the design.
ClassNK is accredited by the Japan Accreditation Board as a product certification body complying with JIS Q 17065:2012 (ISO/IEC 17065:2012) for wind turbine certification and wind farm certification.
Overview / Procedures
| Overview | Regulations on Structural Safety for Wind Turbines and ClassNK Certification Services |
NKRE-RD-2601 Revision 0 |
|---|
| Procedures | Wind Farm Certification Service Procedure | NKRE-SP-0003 Edition: October 2025 |
|---|---|---|
| Guidelines on the Use of Certification Documents and Symbols | NKRE-AP-0001 Edition: October 2025 |
|
| Guideline on Process for Filings of Complaints, Objections and Fraudulent Behaviour |
NKRE-AP-0002 Edition: October 2025 |
Request for Quotation / Application / NK-PASS
| Request for Quotation | Request for Quotation (Initial) PDF Word | NKRE-080-01 Revision 0 |
|---|---|---|
| Application | Application (initial) PDF Word | NKRE-080-03 Revision 0 |
| Application (change) PDF Word | NKRE-080-04 Revision 0 |
|
| NK-PASS | Application for Plan Approval Status Service (Renewable Energy) PDF Word | PASS-APP-E Revision 0 |
| Operation Manual (Renewable Energy) PDF | Revision 15 |
Registrations Statistics
| Registrations | Onshore Wind Farm (As of 2026/03/31) PDF | NKRE-080-07 Revision 0 |
|---|---|---|
| Offshore Wind Farm (As of 2026/03/31) PDF | NKRE-080-07 Revision 0 |
|
| Statistics | Annual Statistics (As of 2025/12/31) PDF | NKRE-AS-01 Revision 0 |
Guideline
| NKRE-GL-WFC01 | Wind Farm Certification, Onshore Wind Power Plant Edition, September 2024 version | |
| Past editions and comparison tables between old and new versions are available on the Guidelines & Publications page . | ||
Address and Contact Details
Address: 4-7 Kioi-cho, Chiyoda-ku, Tokyo 102-8567, Japan
TEL: +81-3-5226-2032
FAX: +81-3-5226-2060
E-Mail: re@classnk.or.jp