Surname Motoishi (Motoishi 
) , around the world, is quite a rare last name. The cognomen Motoishi is characteristic of Japan, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Very seldom, Motoishi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Motoishi | United States, South Africa, Japan, Philippines |