Japan Maritime Association
- Country: Japan
- Type: Organization
- Website: www.classnk.or.jp
- Update: 05-02
The Nippon Kaiji Kyokai (NK or ClassNK for short) is a Japanese non-profit organization responsible for setting standards for classifying vessels and inspecting vessels under construction and commissioned for compliance with safety standards, and is a member of the International Association of Classification Societies (IACS).
