Last name Sangjun (Sangjun 
) , throughout the world, is quite a rare surname. The surname Sangjun is habitual in Thailand, where it is quite a rare surname, South Korea, and Malaysia, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Thailand, South Korea, and China. Much less frequently, Sangjun is the forename as well as the last name.