Cognomen Kazumitsu (Kazumitsu 
, Окамото 
) , all over the world, is a rare family name. The cognomen Kazumitsu is characteristic of Japan, where it is a rare surname, Singapore, where it is a very rare surname, and Russia. In absolute terms, it is the most numerous in Japan, China, and Russia. Likewise, Kazumitsu is the forename as well as the last name.