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Throughout the world, Masao (Masao
, マサオ
, Масао
) is quite a rare predominantly masculine, but scarcely feminine first name. The first name Masao is habitual in Japan, where it is quite a rare primarily masculine, but scarcely girly name, Trinidad and Tobago, where it is quite a rare boy's name, and Hong Kong, where it is a rare male name. In absolute terms, the name is most common in Japan, the United States, and China. More frequently, Masao is the last name as well as the forename.
Masao is also a name for the fictitious and mythical characters: Masao Satō , the fictional character from Crayon Shin-chan and Masao Tachibana , the fictional human from Captain Tsubasa.