Surname Masumo (Masumo 
) , in all the world, is quite a rare family name. The surname Masumo is characteristic of Japan, where it is quite a rare surname, Tanzania, where it is a rare surname, and South Africa, where it is a very rare surname. Much less frequently, Masumo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Masumo | Tanzania, South Africa, India, Indonesia, Japan |