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All around the world, コウジ (Koji , コウジ , Kouzi ) is a common unisex first name. The first name コウジ is characteristic of Japan, where it is quite a rare masculine name, Nigeria, where it is a rare mostly male, but infrequently feminine name, and Hong Kong, where it is a rare masculine name. Measured by absolute frequency, this name is the most popular in Japan, India, and Nigeria. More prevalently, コウジ is the last name as well as the forename.
コウジ is also a name for the fictitious and mythical characters: Koji Segawa , the fictional character of Kamen Rider J; Kohji Haneda , the fictional character from Detective Conan; Koji Kabuto , the fictional character, Mazinger Z; Koji Makaino , character in Bakuman and Koji Hiraiwa , the character from Kuroko's Basketball, among other works.