Worldwide, シゲオ (Shigeo 
, シゲオ ) is quite a rare epicene first name. The given name シゲオ is characteristic of Japan, where it is quite a rare gender-neutral name, the United States, where it is a very rare primarily masculine, but very infrequently female name, and Indonesia, where it is a very rare masculine name. Measured by absolute frequency, this name is the most popular in Japan, China, and the United States. More prevalently, シゲオ is the last name as well as the forename.