Saikō (斉衡) was a Japanese era name (年号,, nengō,, lit. "year name") after Ninju and before Ten'an. This period started in November 854 and ended in February 857. During this time, the emperor was Montoku-tennō (文徳天皇).
Saikō (斉衡) was a Japanese era name (年号,, nengō,, lit. "year name") after Ninju and before Ten'an. This period started in November 854 and ended in February 857. During this time, the emperor was Montoku-tennō (文徳天皇).