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Cognomen キヨシ (Kiyoshi , キヨシ , Kiyosi ) , worldwide, is a common family name. The cognomen キヨシ is habitual in Japan, where it is quite a common surname, Hong Kong, where it is a rare surname, and Singapore. In absolute terms, the name is most common in Japan, China, and Indonesia. Very seldom, キヨシ is the forename as well as the last name.