Family name Masahiro (Masahiro 
, マサヒロ , Масахиро 
) , in the world, is a widespread surname. The surname Masahiro is characteristic of Japan, where it is quite a common surname, Taiwan, where it is quite a rare surname, and Singapore, where it is a rare surname. Measured by absolute frequency, the name is most common in Eastern Asia, particularly Japan, China, and Taiwan. Very seldom, Masahiro is the forename as well as the last name.