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Cognomen ハルコ (Haruko , ハルコ ) , around the globe, is a common last name. The surname ハルコ is characteristic of Japan, where it is quite a common surname, Taiwan, where it is a rare surname, and Myanmar. Not in comparison with a country's population, it most frequently occurs in Japan, Indonesia, and Taiwan. Likewise, ハルコ is the forename as well as the last name.