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Last name هيكارو (Hikaru , هيكارو , Ijuuin) , all over the world, is quite a rare surname. The cognomen هيكارو is characteristic of Indonesia, where it is a rare surname, Iraq, and Singapore. Measured by absolute frequency, it is the most numerous in Indonesia, China, and Japan. Likewise, هيكارو is the forename as well as the last name.