Kōan (Muromachi period)
was a Japanese era name (年号, nengō, lit. year name) of the Northern Court during the Nanboku-chō period after Enbun and before Jōji. The period started in March 1361 and ended in September  1362.  During this time, the pretender in Kyoto was .  Go-Kōgon's Southern Court rival in Yoshino during this time was .