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Family name Koike (コイケ , 小池
, Koike
) , around the world, is quite a rare last name. The surname Koike is characteristic of Bermuda, where it is quite a common surname, Taiwan, where it is quite a rare surname, and Papua New Guinea. Measured by absolute frequency, the name is most common in Japan, Brazil, and Taiwan. More prevalently, Koike is the forename as well as the last name.