Cognomen Toshizumi (Toshizumi 
) , all over the world, is a very rare last name. The last name Toshizumi is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, Toshizumi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Toshizumi | Japan, China, Brazil, United States |