Family name Arimatu (Arimatu 
) , all around the world, is a rare cognomen. The cognomen Arimatu is habitual in Japan, where it is a very rare surname, Nigeria, where it is an extremely rare surname, and India. Much less frequently, Arimatu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Arimatu | Japan, India, Nigeria |