Type Certification for 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.
ClassNK publishes the following documents for type certification of wind turbines.
Overview / Procedures
| Overview | Regulations on Structural Safety for Wind Turbines and ClassNK Certification Services |
NKRE-RD-2601 Revision 0 |
|---|
| Procedures | Wind Turbine Type Certification Service Procedure | NKRE-SP-0001 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 Behaviors |
NKRE-AP-0002 Edition: October 2025 |
Quotation / Application / Annual Report / NK-PASS
| Request for Quotation | Request for Quotation PDF Word | NKRE-070-01 Revision 0 |
|---|---|---|
| Application | Application PDF Word | NKRE-070-03 Revision 0 |
| Annual Report | Annual Report PDF Word | NKRE-070-09 Revision 1 |
| NK-PASS | Application for Plan Approval Status Service (NK-PASS) (Renewable Energy) PDF Word | PASS-APP-J Revision 0 |
| NK-PASS Operation Manual (Renewable Energy) PDF | Revision 15 |
Registration of Type Certification
| Registration | Registration of Type Certification for Small Wind Turbines (as 1th June 2026) PDF | NKRE-070-07 Revision 0 |
|---|---|---|
| Registration of Type Certification for Wind Turbines (as 23th April 2025) PDF | NKRE-070-08 Revision 0 |
Guidelines
| NKRE-GL-WT01 | Certification of Wind Turbine System October 2021 | |
News
| Notification of lifting temporary suspension of type certification for “CF20JAPAN” | 19th June 2019 |
Address and Contact Details
NIPPON KAIJI KYOKAI Renewable Energy Department
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
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