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Family name コウジ (Koji
, コウジ
, Kouzi
) , all around the world, is a widespread surname. The cognomen コウジ is characteristic of Japan, where it is a common surname, Lebanon, where it is quite a rare surname, and Montenegro. Not in comparison with a country's population, it is the most numerous in Japan, China, and Nigeria. Much less frequently, コウジ is the forename as well as the last name.