Kōan (Muromachi period)
Kōan (康安) was a Japanese era name (年号, nengō, lit. year name) of the Northern Court during the Era of Northern and Southern Courts after Enbun and before Jōji. This period spanned the years from March 1361 through September  1362. The emperor in Kyoto was Go-Kōgon-tennō (後光厳天皇). Go-Kōgon's Southern Court rival in Yoshino during this time-frame was Go-Murakami-tennō (後村上天皇)