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Kengen (乾元) was a Japanese era name (年号,, nengō,, lit. "year name") after Shōan and before Kagen. This period spanned the years from November 1302 through August 1303.^[1] The reigning emperor was Go-Nijō-tennō (後二条天皇).^[2]

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.^[3]
• 1302 (Kengen 1): Major repairs and reconstruction at Yakushi-ji.^[4]