South Japan

"With Japan divided, it seems that we are looking to see which Japan has to be reunited. In the south, the Crown Prince, Naruhito, is now trying to do his best to avenge Akihito after he commited a seppuku. Now the Imperial government must take back North Japan. Now I will help South Japan for Luna. And for Naruhito."

--Su Ji-Hoon, Luna Crowns Naruhito

South Japan (南日本, Minami Nihon) is an East Asian nation located in the southernmost portions of the Japanese archipelago.

Trivia

 * Unlike in most of wiki articles that relate South Japan, where it is a republic instead of being a constitutional monarchy, South Japan is a constitutional monarchy in this story.