In the world, Osamumasaru (Osamumasaru 
) is quite a rare male given name. The given name Osamumasaru is characteristic of Eastern Asia, particularly Japan, where it is quite a rare masculine name. Very seldom, Osamumasaru is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Osamumasaru | Japan |