Last name 井健太郎 (井健太郎 
) , around the globe, is a very rare family name. The family name 井健太郎 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 井健太郎 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 井健太郎 | China |