1 known fake site impersonate this classification society
Only use the official certificate verification portal listed below.
Nippon Kaiji Kyokai
ClassNK
IACS Member
EU Recognized
Nippon Kaiji Kyokai (ClassNK) is Japan’s national classification society and a full IACS member. It is one of the world’s largest classification societies by classed tonnage, providing classification and statutory certification services globally.
How to Verify
1. Use the ClassNK vessel search
ClassNK provides online access to class records through its official website. Search by IMO number to verify current class status and valid certificates.
2. Check the certificate reference
ClassNK certificates carry a unique reference number. Contact ClassNK directly through their official website if a record cannot be confirmed online.
3. Red flags
- Use of
classnk.org— this domain impersonates ClassNK; the genuine ClassNK operates under a.or.jpJapanese domain - Certificate contact email not at a ClassNK domain
- No unique certificate reference number