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In all the world, Kosaka (コサカ , Kosaka , Косака ) is a rare dominantly male, but uncommonly girly given name. The first name Kosaka is characteristic of China, where it is a very rare predominantly boy's, but very infrequently girly name, and India, where it is an extremely rare girly name. Much less frequently, Kosaka is the last name as well as the forename.
Kosaka is also a name for the fictitious and mythical characters: .