Worldwide, Kai Jun (Kai Jun 
) is a very rare masculine first name. The given name Kai Jun is habitual in South-eastern Asia, particularly Singapore, where it is a rare male name, and Malaysia, where it is a very rare boy's name. Much less frequently, Kai Jun is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kai Jun | Singapore, China, Malaysia, Australia |