Planet Kaishin

Planet Kaishin ("World-Core") is the original home planet of all Kai and Kaioshin. The planet is a "large version of a Kai Planet" (something like a larger version of King Kai's planet). The population of Planet Kaishin is roughly 80.

Overview
On Planet Kaishin, there are gigantic trees called the Kaiju (World-Tree). These trees sprout beings called Shin-jin from magical fruits. These Shin-jin can possibly take the role of a Kai if incredibly lucky or if born from special golden fruit, in which case they then become Kaioshin. The evil Shin-jin born on Planet Kaishin are cast into the Demon Realm located at the very tip of the universe, which is ruled by Makaioshin, to be kept separate from civilization, and they become Makaio.

Known residence
Note: Most Shin-jin shown in the series were all Kais at the time of their appearances, thus all left their home world ages ago.

Shin-jin

 * Kibito

Kais

 * King Kai (North Kai)
 * South Kai
 * East Kai
 * West Kai
 * Grand Kai

Kaioshins

 * Supreme Kai (Eastern Supreme Kai)
 * Southern Supreme Kai
 * Western Supreme Kai
 * Northern Supreme Kai
 * Grand Supreme Kai
 * Old Kai

Makaioshin

 * Possibly Lucifer
 * Possibly Dabura, likely but never officially stated
 * Possibly Shula, likely but never officially stated
 * Possibly Towa