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Worldwide, Kasai (カサイ , Kasai , Касай ) is quite a rare gender-neutral given name. The first name Kasai is characteristic of Israel, where it is a rare gender-neutral name, Nigeria, and India, where it is a rare dominantly feminine, but seldom masculine name. Measured by absolute frequency, it is commonest in India, Nigeria, and China. Much less frequently, Kasai is the last name as well as the forename.