永えい万まんえいまんMeanings1nounEiman era (1165.6.5-1166.8.27)Japanese era name (年号) from the late Heian period, spanning roughly one year.永えい万まんは、平へい安あん時じ代だい末まっ期きの元げん号ごうの一ひとつです。Eiman is one of the era names from the late Heian period.