Revision History
Revision
NumberRevision
Date

RevisedSections

001.12.2017-

1

10.01.2018

Whole

Integrated appearance
Added Article 10.5

2

01.06.2018

10.3.1

Corrected errors

3

01.04.2019

Whole

Changed document numbers and overall appearance

4

01.05.2019

Whole

Completely revised

501.04.2020-

601.02.2021

701.10.2021

805.04.2023

10.2.110.2.410.4.1
10.4.2
11.1.111.1.311.2.3
9.1
10.1
3.1
9.2

Reason for Revision
Newly established

Revised due to organizational restructuring and changes indepartment names.

Addition and correction of the wording

Update of Figures
Request for Quotation is newly added.
Revised the version of Interpretation of Technical Standards forWind Power Generation Facilities.
Modified correspond to the new system of Registered Conformity
Assessment Body.

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Table of Contents
1. Application .............................................................................................................................................. 3
1.1 General.......................................................................................................................................... 3
2. Terms and Definitions ............................................................................................................................. 3
2.1 General.......................................................................................................................................... 3
3. Certification Criteria ................................................................................................................................ 3
3.1 General.......................................................................................................................................... 3
4. General ................................................................................................................................................... 4
4.1 Language and units....................................................................................................................... 4
4.2 Provision of information................................................................................................................. 4
4.3 Submission of documents from the requester .............................................................................. 4
5. Terms and Conditions of Providing Services .......................................................................................... 4
5.1 General.......................................................................................................................................... 4
5.2 Confidentiality ................................................................................................................................ 5
5.3 Interpretation ................................................................................................................................. 5
6. Responsibilities ....................................................................................................................................... 5
6.1 Responsibilities ............................................................................................................................. 5
6.2 Compensation ............................................................................................................................... 5
6.3 Claim for compensation ................................................................................................................ 5
7. Miscellaneous Provisions ....................................................................................................................... 5
7.1 Appeal ........................................................................................................................................... 5
7.2 Others............................................................................................................................................ 5
8. Governing Law and Agreed Jurisdiction, etc. ......................................................................................... 6
8.1 Governing Law and Agreed Jurisdiction, etc. ............................................................................... 6
9. Implementation of Evaluations Related to Certification .......................................................................... 6
9.1 Evaluation module and type of certification .................................................................................. 6
9.2 Certification documents and symbols ........................................................................................... 7
9.3 Registration ................................................................................................................................... 8
9.4 Cancellation or termination of certification .................................................................................... 8
9.5 Occasional surveillance ................................................................................................................ 8
9.6 Changes ........................................................................................................................................ 9
10. Procedures for applying for certification ................................................................................................. 910.1 Initial application............................................................................................................................ 910.2 Application for changes ................................................................................................................. 9-2-

1. Application
1.1 General-1. This procedure stipulates wind farm certifications for wind power plants.
-2. In principle, this procedure shall apply to wind power plants in Japan with an output of 500 kW or more than
500 kW and that are subject to the Electric Business Act. In other cases, the provisions separately specified by
NIPPON KAIJI KYOKAI (hereafter referred to as “ClassNK”) shall be applied as appropriate.
2. Terms and Definitions
2.1 General-1. The major terms and definitions used in this procedure shall conform to JIS Q 17065 and JIS C 1400-22, orshall be as follows.
Terms

Definition

Requester

A person who submits an application for examination pertaining to wind farm certification.

NK-PASSThe document submission and management system available on ClassNK website.

Registration

A document that registers wind farms for which ClassNK has issued the certification
documents. This document is intended to be disclosed.

Registrant

A party to whom ClassNK issues the certification documents, among those who have requested
ClassNK to provide wind farm certification services (requesters).

3. Certification Criteria
3.1 General-1.

ClassNK evaluates wind farm certification by applying the following standards, together with thespecifications cited therein. In principle, the latest version of such standards and the specifications cited thereinshall be applied. However, in cases other than those where it is always required to apply the latest version, andwhere the old version is also valid, the application of the standards that are not from the latest version and thespecifications cited therein may be permitted only when ClassNK determines it appropriate. In addition,
application of international standards of equivalence should also be permitted.
(1) JIS C 1400-1: Wind turbines - Part 1: Design requirements(2) JIS C 1400-3: Wind turbines - Part 3: Design requirements for offshore wind turbines(3) Ordinance No. 53, Ministry of International Trade and Industry of March 27, 1997: "Ministerial
Ordinance Prescribing Technical Standards for Wind Power Generation Facilities"(4) 20140328 Shoukyoku, No. 1: "Interpretation of Technical Standards for Wind Power Generation
Facilities" (Revised 20230310 Hokyoku, No.2)(5) Japan Society of Civil Engineers: "Guidelines and Explanation for the Design of Support Structures ofWind Power Generation Facilities (2010 version)"(6) Germanischer Lloyd (GL) Guideline for the Certification of Wind Turbines 2010(7) Germanischer Lloyd (GL) Guideline for the Certification of Offshore Wind Turbines 2012
(8) JIS C 1400-22: Wind turbines - Part 22: Wind turbine conformity testing and certification (JIS C 1400-22,
the same shall apply hereinafter)-2.

International standards, national standards, and regulations of certification bodies other than those listed

above may also be applied as certification standards if ClassNK determines it appropriate.

-3-4. General
4.1 Language and units-1. Japanese shall be used in principle for communication with ClassNK and in the documents to be submitted.
English is acceptable if ClassNK determines it appropriate. Other languages shall not be accepted.
-2. The SI unit system shall be used in principle for communication with ClassNK and in the documents to besubmitted.
-3. Certificates issued by ClassNK shall be written in both Japanese and English.
-4. Certification evaluation reports issued by ClassNK shall be prepared in Japanese.
4.2 Provision of information-1. The requester shall provide sufficient and accurate information (documents, records, etc.) that ClassNK
determines necessary for providing certification services. Documents shall be submitted as requested by ClassNK.
-2. The requester shall make available to ClassNK, as required, the records of all communications and the actions
taken in accordance with the applicable standards or other relevant standards, etc.
4.3 Submission of documents from the requester-1. The documents requested by ClassNK shall be submitted through NK-PASS in principle, and may also be
submitted by postal mail and/or e-mail if determined appropriate by ClassNK.
5. Terms and Conditions of Providing Services
5.1 General-1. The conditions set forth in this article shall apply to any and all services provided by ClassNK related to windfarm certification (hereinafter, "services"), and shall be deemed to form part of all contracts and other agreements
concluded by ClassNK with regard to the services.
-2. ClassNK shall perform the services with adequate care and in an appropriate manner as an expert.
-3. The services shall be provided in accordance with these procedures, on the premise of the conditions
described in (1) and (2) below:(1) The document concerning the wind farm certification, which is issued after ClassNK has performed theservices, is to indicate the state of the wind farm at the time when the services were performed. In
addition, the document shall not be intended to certify or report beyond the matters and the scope statedtherein.
(2) Documents issued by ClassNK related to the wind farm certification services are intended for use by its
requesters or duly authorized persons, and are not intended for use by any other third party.
-4. Nothing in the conditions of providing services or in any documents issued by ClassNK related to the services
shall excuse the requester or any other parties from any product warranty, other contractual obligations that they
are obliged to assume, or negligence, nor shall it grant any claim for reimbursement, compensation, or any otherclaim against any third party.
-5. Fees for providing services shall be paid on the following conditions:(1) Fees, etc. for the certification service provided by ClassNK shall be in accordance with the stipulations
established separately by ClassNK. ClassNK shall have the right to change the provisions on fees, etc.
voluntarily.
(2) The estimate for the certification services issued by ClassNK is based on the provisions of the fee, etc.
made at the time of issuance. If the fee, etc. is changed or the number of man-hours involved issignificantly changed from the original estimate, a revised estimate shall be prepared and presented to therequester.

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(3) Fees, etc. related to the certification services provided by ClassNK shall be claimed in accordance withthe provisions separately defined by ClassNK after the relevant certification service is completed, andshall be paid by the requester within 60 days from when the invoice is issued.
(4) In case of a delay in payment, we shall charge a delay loss of 5% per year.
(5) If the requester withdraws the request for the certification services for their convenience, we shall charge
the requester for the fee of the portion of the services already performed.
5.2 Confidentiality-1. All documents and information provided to ClassNK are confidential and shall not be disclosed to any third
party for purposes other than those for which they were offered, unless the party who provided the document or
information agrees in advance. The results of the services performed by ClassNK shall be treated as confidential
in the same way. However, the details or copies of documents, or information or results of the services performed
shall be disclosed only if duly requested under the law by a court order, legal proceedings, or by official
authorities such as a national government.
5.3 Interpretation-1. The conditions and rules of providing services, and the effect, application, and interpretation of the documents
issued by ClassNK shall be determined by ClassNK.
6. Responsibilities
6.1 Responsibilities-1. ClassNK or its officers, employees, agents, or subcontractors shall not be liable in any way for any losses,
damages, or expenses incurred by any person as a result of any act, omission, or negligence during the provisionof the services.
6.2 Compensation-1. Despite the provisions defined in Article 7.1, if it is demonstrated that a loss, damage, or expense incurred by
the requester is attributed to any action or omission resulting from the negligence of any officer, employee, agent,or subcontractor of ClassNK, ClassNK shall compensate for the loss, damage, or expense so demonstrated up to
the amount of the fee requested and received by ClassNK for the services performed.
6.3 Claim for compensation-1. Any claim for the compensation for loss, damage or expense as stipulated in Article 7.2 shall be made inwriting to ClassNK within six months from the date on which the service was first performed. If no claim forcompensation is made within this period, any claim for the compensation shall be deemed waived.
7. Miscellaneous Provisions
7.1 Appeal-1. If the requester is dissatisfied with the result of the wind farm certification service performed in accordancewith these procedures, they may request that ClassNK investigate the wind farm concerned within 30 days fromthe day following the date of issue of the wind farm certificate in writing, according to the "RE-5 Complaints andObjections Procedures."
7.2 Others-1. ClassNK may conclude a non-disclosure agreement upon request of the requester. The details of suchagreement shall be determined upon separate deliberation.

-5-8. Governing Law and Agreed Jurisdiction, etc.
8.1 Governing Law and Agreed Jurisdiction, etc.
-1. The interpretation of the procedures shall be in compliance with the laws of Japan, and the Tokyo District
Court shall be the exclusive agreement jurisdictional court of the first instance for all disputes related to theprocedures.
9. Implementation of Evaluations Related to Certification
9.1 Evaluation module and type of certification-1. The certification services provided by ClassNK consists of all the modules shown in (1) to (5) below for the
type-certified wind turbines in principle. The relationships between individual modules are shown in Figure 1.
(1) Site conditions assessment(2) Design basis evaluation(3) Integrated load analysis(4) Wind turbine (RNA) design evaluation(5) Support Structure design evaluation-2. When the wind power plant of interest is located onshore, the following modules described in (1) to (3) may
be used instead of the previous item "-1". The relationship between the modules in this case is shown in Figure 2.
(1) Site conditions assessment [wind conditions](2) Wind turbine (RNA) design evaluation [including design basis evaluation, integrated load analysis](3) Support Structure design evaluation [including Site conditions assessment [Geotechnical / Earthquake
conditions], design basis evaluation, integrated load analysis]-3.

If the wind farm is located onshore, the requester can specify whether all or only some of the modules

shown in the preceding item "-2" should be implemented. In this case, the requester shall notify ClassNK to thiseffect when applying for certification as described in Article 11.

Fig. 1: Evaluation module for wind farm certification-6-

Fig. 2: Evaluation module for wind farm certification [in the case of onshore wind power plants]
9.2 Certification documents and symbols-1. If it is confirmed that the design of the proposed wind turbine and the support structure conforms to thecertification standards, ClassNK shall issue certification documents to the requester in accordance with theimplementation procedures defined in Article 10.1. In principle, the examination will be continued until theabove-mentioned conformity is confirmed, unless there is a special request from the client or an agreement
between the client and ClassNK.
-2. The certification documents issued by ClassNK shall be the following described in (1) to (7). In principle, no
expiration date is set for these certification documents.
(1) Wind Farm Certificate(2) Site Conditions Conformity Statement and Certification Evaluation Report (site conditions evaluation)(3) Design Basis Evaluation Conformity Statement and Certification Evaluation Report (design basis
evaluation)(4) RNA Design Conformity Statement and Certification Evaluation Report (wind turbine design evaluation)(5) Support Structure Design Conformity Statement and Certification Evaluation Report (support structure
design evaluation)(6) Checklist for conformity to the Unified Interpretation of Technical Standards for Offshore Wind Power
Generation Facilities(7) Checklist for conformity to the technical standards for wind power generation facilities (subject to
Articles 4, 5 and 7 only)-3. When the wind power plant is located onshore, the certification documents issued by ClassNK shall be either
all of the following described in (1) to (5) or a combination of (2) to (4) and (5), regardless of the previous Item "2". In principle, no expiration date is set for these certification documents.
(1) Wind Farm Certificate(2) Site Conditions Conformity Statement and Certification Evaluation Report (site wind conditions
evaluation)(3) RNA Design Conformity Statement and Certification Evaluation Report (wind turbine design evaluation)(4) Support Structure Design Conformity Statement and Certification Evaluation Report (support structure
design evaluation)(5) Checklist for conformity to the technical standards for wind power generation facilities (subject to
Articles 4, 5 and 7 only)-7--4. Only in cases specifically permitted by ClassNK, certification documents may be issued with outstanding
issues and a response time limit specified therein. In such cases, the validity of the certification documents shall
expire by the time limit, and if necessary measures are not taken by the time limit, the certification may becancelled in accordance with the provisions of Item 10.4.
-5. For any certification documents listed in Item 10.2-2, if there is a change in the description and related
information in the submitted document, which is reviewed by ClassNK in its evaluation module, the certification
documents shall be invalidated.
-6. For the use of certification documents and symbols, the registrant shall follow "RE-4 Guidelines on the Use of
Certification Documents and Symbols."
9.3 Registration-1. When it is decided that a wind farm certification shall be awarded, ClassNK shall register at least the name of
the wind power station, the wind turbine type, the number of wind turbines, the subject to be certified, thecertificate number, the date of issue, and the expiration date (if applicable) in the Registration, and make suchinformation open to the public collectively every quarter. The same shall apply when there is a change in thedescription of certification that affects the Registration.
-2. If it is decided to cancel or terminate certification is decided, the Registration shall be promptly renewed andpublicized.
9.4 Cancellation or termination of certification-1. If any of the following applies to the certified wind farms and registrants, ClassNK shall consider cancelingthe certification and notify the registrant thereof, including the due date for response.
(1) In the case where fees related to certification services are not paid by the due date(2) In the case where, due to insufficient understanding of the certification, the registrant takes action, makes
a statement, or publishes printed materials or web pages that may undermine the status, honor, or
legitimacy of ClassNK(3) In the case where the certification documents were used misleadingly(4) In the case where a certification with outstanding issues and a response time limit specified in Item 10.2.4
is issued and the necessary response is not taken by the response deadline.
(5) In the case where changes related to the certification subject are made without ClassNK’s approval-2. If the registrant fails to complete the action by the response due date set out in Item 10.4-1, ClassNK
maycancel the certification. In that case, ClassNK shall notify the registrant of cancellation of the certification,
along with the reason for the decision.
-3. If the registrant is dissatisfied with the decision on certification or revocation of certification made byClassNK, they may express a formal objection against ClassNK, in accordance with "RE-5

Guidelines

onFilings of Complaints and Objections ."-4. ClassNK shall terminate certification when the registrant notifies us of the termination.
-5. When the certification is cancelled or terminated, the registrant shall promptly return the certification
documents to ClassNK, or destroy it.
9.5 Occasional surveillance-1. Occasional surveillance shall be conducted when ClassNK deems it necessary.
-2. If a nonconformity is found in an evaluation made by ClassNK, the registrant shall be notified of the nature of
the nonconformity and the due date for response and shall correct the nonconformity by that date. If, however,after consultation with the registrant, no agreement will be reached with the registrant regarding the due date for-8-response, a due date that can be agreed upon between ClassNK and the registrant shall be reestablished.
-3. If correction is not completed by the due date for response, the certification shall be revoked and the registrant
shall be notified accordingly.
9.6 Changes-1.

The registrant may apply for a change review if there is a change in the description of the certification

documents issued by ClassNK.
-2.

The registrant shall return the original certification documents to ClassNK or destroy it, as soon as theyreceive the changed certification documents.
10. Procedures for applying for certification
10.1
-1.

Initial application
Application for the initial certification shall be accepted upon receipt of the submitted "RE-081-03

Application for Wind Farm Certification (Initial),". The requester shall be deemed to have agreed with thedescription of the procedures that are valid as of the application date, upon submission of the application form.
-2. When the requester submits an application for certification review, ClassNK shall accept the application after
confirming that there are no defects in the description of the application, and send the application form forcertification review with a seal of acceptance to the requester.
-3. If there is any change in the items described after submitting the application form, ClassNK shall be notifiedof the change immediately.
-4. As for the fee of certification, in case of onshore wind power plant the quotation shall be presented to therequester in the form of an estimate prepared in accordance with the provisions of Item 5.1-5 upon receipt of thesubmitted "RE-081-05 Request for Quotation, Wind Farm Certification (Initial)". Moreover, in case of offshore
wind power plant, the quotation shall be presented to the requester according to the individual situation. In
addition, an order or the like shall be processed separately in response to a request from the requester.
10.2

Application for changes-1. The acceptance of an application for a change in certification shall be made upon submission of the "RE-08104 Application for Wind Farm Certification (Change)," which is publicized by ClassNK. The requester shall bedeemed to have agreed with the description of the procedures upon submission of the application form.
-2. When the requester submits an application for certification review, ClassNK shall accept the application after
confirming that there are no defects in the description of the application, and send the application form forcertification review with a seal of acceptance to the requester.
-3. If there is any change in the items described after submitting the application form, ClassNK shall be notifiedof the change immediately.
-4. The fees related to the certification shall be presented to the requester by ClassNK in the form of an estimate
prepared in accordance with the provisions of Item 5.1-5, depending on the description of the application form forcertification review. In addition, an order or the like shall be processed separately in response to a request fromthe requester.

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