The People's Republic of Japan (P.R.J.; Japanese: 日本人民共和国, nihon jinmin kyōwakoku), commonly known as North Japan (北日本, kita-nippon), is an East Asian nation located in the northernmost portions of the Japanese archipelago. North Japan was established in the 1950s from the Soviet occupied zones of the former Empire of Japan. North Japan is a single-party socialist state, with the Communist Party being the primary political force of the nation. According to its constitution, North Japan is a neutral nation and a democratic republic.