Kengen

Kengen (乾元) was a Japanese era name (年号) after Shōan and before Kagen. This period spanned the years from November 1302 through August 1303. The reigning emperor was Go-Nijō-tennō (後二条天皇).

Change of era

 * 1302 Kengen gannen (乾元元年): 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 Shōan 4.

Events of the Kengen era

 * 1302 (Kengen 1, 16th day of the 6th month):Emperor Go-Nijo visited the home of retired Emperor Kameyama.
 * 1302 (Kengen 1): Major repairs and reconstruction at Yakushi-ji.