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Surname Hikari (光 , Hikari , ヒカリ ) , in all the world, is a widespread cognomen. The family name Hikari is habitual in Japan, where it is quite a common surname, China, and Armenia, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in China, Japan, and Indonesia. More prevalently, Hikari is the forename as well as the last name.