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Family name Katsuya (カツヤ , Katsuya , Кацуя ) , in all the world, is a common cognomen. The family name Katsuya is habitual in Japan, where it is quite a common surname, Taiwan, where it is a rare surname, and Singapore. In absolute terms, the name is most common in Japan, China, and Indonesia. Much less frequently, Katsuya is the forename as well as the last name.