Family name Токуи (Tokui 
, Токуи 
) , in all the world, is a very rare surname. The last name Токуи is characteristic of Japan, where it is a very rare surname, Canada, where it is an extremely rare surname, and Venezuela. In absolute terms, this name is the most popular in Japan, Brazil, and Canada. Much more frequently, Токуи is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tokui | Japan, United States, Canada, Brazil, Venezuela |
| Токуи | Russia |