1452Kyōtoku gannen (享徳元年): The era name was changed to mark an event or a number of events. The old era ended and a new one commenced in Hōtoku 4.
Events of the Kyōtoku era
1453 (Kyōtoku 2, 6th month): The name of the Shōgun, "Yoshinari", was changed to Ashikaga Yoshimasa, which is the name by which he is more commonly known in modern times.
1454 (Kyōtoku 3): Ashikaga Shigeuji orchestrated for the killing of Uesugi Noritada, thus beginning a series of conflicts for control of the Kantō; and this event would come to be known as the Kyōtoku no Ran.