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Cognomen Nanase (大川 , ナナセ , Nanase ) , across the world, is quite a common family name. The cognomen Nanase is habitual in Japan, where it is quite a rare surname, China, where it is a rare surname, and South Africa, where it is a very rare surname. In absolute terms, it is commonest in China, Japan, and Indonesia. More prevalently, Nanase is the forename as well as the last name.