Ryakunin (暦仁) was a Japanese era name (年号,,nengō,, lit. "year name") after Katei and before En'ō. This period spanned the years from November 1238 to April 1239. The reigning emperor was Shijō-tennō (四条天皇).
1238Ryakunin gannen (暦仁元年): The era name was changed to mark an event or a number of events. The previous era ended and a new one commenced in Katei 4.
Events of the Ryakunin Era
1238 (Ryakunin 1, 1st month): Yoritsune leaves Kamakura en route to Miyako, accompanied by Yaskutoki and the troupes of several provinces. Fujiwara no Yukimitis stays at Kamakura to preserve order in the land.
1238 (Ryakunin 1, 2nd month): Yoritsune arrives in Miyako and begins to live in his new palace at Rokuhara.
1238 (Ryakunin 1, 10th month): Yoritsune leaves Miyako to return to Kamakura.