In all the world, Inaoka (Inaoka 
) is a very rare boy's forename. The first name Inaoka is habitual in Eastern Asia, particularly China, where it is an extremely rare male name. More frequently, Inaoka is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Inaoka | Japan, China, United States, Canada, Brazil |