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Surname 利治 (Toshiharu , 利治 ) , in all the world, is quite a rare family name. The family name 利治 is characteristic of Japan, where it is quite a rare surname, Singapore, where it is a rare surname, and Malaysia, where it is a very rare surname. In absolute terms, the name is most common in Japan, China, and Singapore. Much less frequently, 利治 is the forename as well as the last name.