Family name 落海 (落海 
, Ochiumi 
) , in all the world, is an extremely rare surname. The surname 落海 is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Much more frequently, 落海 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 落海 | China |
| Ochiumi | United States |