Surname Yusaku (Yusaku 
) , worldwide, is a rare last name. The family name Yusaku is characteristic of Japan, where it is a very rare surname, Malaysia, and China, where it is an extremely rare surname. More prevalently, Yusaku is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yusaku | Singapore, Brazil, Japan, United States, China |