EienEien was a Japanese era name after Kanna and before Eiso. This period spanned the years from April 987 through August 988. The reigning emperor was Emperor Ichijō.Change of eraJanuary 2, 987 Eien gannen: The new era name was created to mark an event or a number of events. The previous era ended and a new one commenced in Kanna 3, on the 5th day of the 4th month in the year 987.Events of ''Eien'' era987 : The emperor paid a visit to the home of Fujiwara no Kaneie.987 : The emperor visited Iwashimizu Hachiman-gū.987 : The emperor visited the Kamo Shrine.988 : Fujiwara no Kaneie invited a number of courtiers to his home where he entertained them in a grand manner.988 : The emperor visited the home of Kaneie to join him in celebrating the courtier's 60th birthday.