Kōkoku (興国) was a Japanese era of the Southern Court during the Era of Northern and Southern Courts after Engen and before Shōhei, lasting from April 1340 to December 1346. The emperor in Kyoto was . Go-Kōgon's Southern Court rival in Yoshino during this time-frame was .
Nanboku-chō overview
thumb|140px|The Imperial seats during the Nanboku-chō period were in relatively close proximity, but geographically distinct. They were conventionally identified as:
During the Meiji period, an Imperial decree dated March 3, 1911, established that the legitimate reigning monarchs of this period were the direct descendants of Emperor Go-Daigo through Emperor Go-Murakami, whose had been established in exile in Yoshino, near Nara.
Until the end of the Edo period, the militarily superior pretender-Emperors supported by the Ashikaga shogunate had been mistakenly incorporated in Imperial chronologies despite the undisputed fact that the Imperial Regalia were not in their possession.
- 1342 (Kōtoku 3): is removed from his position as daijō daijin.