Surname Masuyu (Masuyu 
) , worldwide, is a very rare last name. The last name Masuyu is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. More prevalently, Masuyu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Masuyu | Malaysia, Thailand, Japan |