Cognomen Saitsu (Saitsu 
) , worldwide, is a very rare last name. The surname Saitsu is habitual in Latin America and the Caribbean, particularly Brazil, where it is an extremely rare surname. More prevalently, Saitsu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Saitsu | Japan, China, Brazil |
| hirotomo saitsu researcher |
|