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Surname Harui (Harui , 春井 , Харуи ) , in all the world, is a rare cognomen. The surname Harui is characteristic of Singapore, where it is a rare surname, Malaysia, where it is a very rare surname, and Kyrgyzstan. Measured by absolute frequency, the name is most common in China, Mexico, and the United States. Much more frequently, Harui is the forename as well as the last name.