Surname Takaharu (Takaharu 
) , in all the world, is a rare last name. The surname Takaharu is habitual in Japan, where it is a very rare surname, Malaysia, and China, where it is an extremely rare surname. Likewise, Takaharu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Takaharu | Brazil, Malaysia, Japan, United States, China |
| naitō takaharu (b. 1528) |
|