Around the world, Rihaku (Rihaku 
) is an extremely rare male first name. Very seldom, Rihaku is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Rihaku | Japan, India |
Rihaku is also a name for the fictitious and mythical characters: Rihaku .
| rihaku harada (b. 1890) |
|