Family name Daijo (Daijo 
) , in all the world, is quite a common last name. The last name Daijo is habitual in Japan, where it is quite a rare surname, Indonesia, where it is a very rare surname, and Brazil, where it is an extremely rare surname. Likewise, Daijo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Daijo | Brazil, India, Japan, Indonesia, United States |