Eien
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Eien (永延) was a Japanese era (年号, nengō; lit. "year name") after Kanna and before Eiso. This period spanned the years from April 987 through August 988. The reigning emperor was Ichijō-tennō (一条天皇).
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Eien (永延) was a Japanese era (年号, nengō; lit. "year name") after Kanna and before Eiso. This period spanned the years from April 987 through August 988. The reigning emperor was Ichijō-tennō (一条天皇).