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Family name Hiroto (ヒロト , Hiroto , Хирото ) , around the world, is a common surname. The cognomen Hiroto is characteristic of Japan, where it is quite a common surname, Taiwan, where it is a rare surname, and Hungary. Measured by absolute frequency, this name is the most popular in Eastern Asia, particularly Japan, China, and Taiwan. Very seldom, Hiroto is the forename as well as the last name.