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Family name Sasai (Sasai , Сасаи ) , in the world, is quite a rare surname. The cognomen Sasai is habitual in Armenia, where it is quite a common surname, Slovakia, where it is a rare surname, and Thailand. Not in comparison with a country's population, the name is most common in Armenia, Thailand, and Kenya. Very seldom, Sasai is the forename as well as the last name.