Keian (慶安) was a Japanese era name (年号,, nengō,, lit. "year name") after Shōhō and before Jōō. This period started in February 1648 and ended in September 1652. During this time, the emperor was Go-Kōmyō-tennō (後光明天皇).
Keian (慶安) was a Japanese era name (年号,, nengō,, lit. "year name") after Shōhō and before Jōō. This period started in February 1648 and ended in September 1652. During this time, the emperor was Go-Kōmyō-tennō (後光明天皇).