Surname Масатоси (Masatoshi 
, Masatosi 
, Usune 
) , in all the world, is quite a common family name. The family name Масатоси is habitual in Eastern Asia, particularly Japan, where it is quite a rare surname, Taiwan, and Hong Kong, where it is a rare surname. In absolute terms, it is commonest in Eastern Asia, particularly Japan, China, and Taiwan. Very seldom, Масатоси is the forename as well as the last name.