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Last name Tatsuya (Tatsuya , Татсуя , ทัตสึยะ ) , around the world, is quite a rare cognomen. The last name Tatsuya is habitual in Japan, where it is quite a rare surname, Singapore, where it is a rare surname, and Taiwan. Not in comparison with a country's population, it most frequently occurs in Japan, China, and Indonesia. Also, Tatsuya is the forename as well as the last name.