>
In the world, Isao (功 , Isao , イサオ ) is a common principally boy's, but scarcely feminine forename. The first name Isao is characteristic of China, where it is quite a rare predominantly boy's, but very seldom girly name, Japan, where it is quite a rare masculine name, and Israel, where it is a rare predominantly male, but very infrequently girly name. Measured by absolute frequency, it is commonest in China, Japan, and the United States. Likewise, Isao is the last name as well as the forename.