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Family name Takeuchi (タケウチ , Takeuchi , 竹内 , along with others...) , all over the world, is quite a common cognomen. The cognomen Takeuchi is characteristic of Japan, where it is quite a rare surname, Singapore, and Hong Kong, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Japan, the United States, and Brazil. More prevalently, Takeuchi is the forename as well as the last name.