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Worldwide, 小谷 (小谷 , Kotani ) is a rare unisex first name. The first name 小谷 is characteristic of China, where it is a very rare dominantly boy's, but seldom feminine name, Japan, where it is a very rare girly name, and India, where it is an extremely rare unisex name. Also, 小谷 is the last name as well as the forename.