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Worldwide, Kosugi (コスギ , Kosugi , 小杉 ) is a rare largely masculine, but infrequently feminine forename. The first name Kosugi is characteristic of Eastern Asia, particularly China, where it is a very rare largely male, but seldom feminine name. Much less frequently, Kosugi is the last name as well as the forename.
Kosugi is also a name for the fictitious and mythical characters: .