Cognomen Koubun (Koubun ) , all around the world, is an extremely rare surname. Much more frequently, Koubun is the forename as well as the last name.
Kimiaya, Kimifumi, Kobun, Konbun, Kubun, Kumon, Kōbun, Кумон, コウブン, and 公文
Matsumoto
) , all around the world, is an extremely rare surname. Much more frequently, Koubun is the forename as well as the last name.