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Family name ちひろ (Chihiro , ちひろ) , in all the world, is a rare last name. The cognomen ちひろ is habitual in Japan, where it is a rare surname, Singapore, and Cambodia, where it is a very rare surname. In absolute terms, it most frequently occurs in Japan, China, and Indonesia. More prevalently, ちひろ is the forename as well as the last name.