Family name Tosiharu (トシハル 
, Tosiharu 
) , globally, is quite a common last name. The cognomen Tosiharu is habitual in Eastern Asia, particularly Japan, where it is quite a rare surname. Very seldom, Tosiharu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| トシハル | Japan |
| Tosiharu | Brazil |