Surname Kai-Ka (Kai-Ka 
) , all over the world, is a very rare family name. The surname Kai-Ka is habitual in Eastern Asia, particularly Japan, where it is a very rare surname. Also, Kai-Ka is the forename as well as the last name. Parts of the name also exists independently as a first name Kai, and a first name Ka.
| VARIANT | COUNTRY |
|---|---|
| Kai-Ka | Japan |