As of December 2007,[update] ClassNK had classified 6,793 ships with a total of 152.22 million gross tons, representing about 20% of the world merchant fleet currently under class.

Although based in Japan, its surveyors work at shipbuilding and repair yards and ports around the world, examining ships wherever they are needed.

[1][2] Service offered by ClassNK include ship classification surveys, statutory surveys, and certification on behalf of Flag States based on international conventions, codes, national statutes, and its own rules and regulations.

The organization also provides assessment and certification services for the safety management systems of ship management companies and the quality systems of ship builders and related manufacturers, acting as an independent third party.

In addition, it offers appraisal, consulting, and supervisory services for both marine and non-marine related projects.