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In the entire world, Kosen (Kosen , Kose , Causa ) is a common masculine first name. The given name Kosen is characteristic of Japan, where it is quite a common masculine name, Austria, where it is a rare boy's name, and South Africa, where it is a rare mostly masculine, but uncommonly feminine name. Not in comparison with a country's population, it most frequently occurs in Japan, India, and Nigeria. Likewise, Kosen is the last name as well as the forename.
Kosen is also a name for the fictitious and mythical characters: .