Surname Hiroharu (Hiroharu 
) , in the world, is a very rare cognomen. The last name Hiroharu is characteristic of Singapore, where it is a very rare surname, Spain, and China, where it is an extremely rare surname. Likewise, Hiroharu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hiroharu | Brazil, South Korea, China, United States, Spain |