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Kenji (建治) is a Japanese era name (年号,, nengō,, lit. "year name") which followed Bun'ei and preceded Kōan. This period spanned the years from April 1275 to February 1278.^[1] The reigning emperor was Go-Uda-tennō (後宇多天皇).^[2]

Change of era

• 1275 Kenji gannen (建治元年): 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 Bun'ei 12.

Events of the Kenji era

• 1275 (Kenji 1): The Mongols sent an ambassador to Kamakura along with the delegation which accompanied the envoy from the Goryeo. The unwelcome visitor was put to death; and his severed head was publicly displayed.^[3]
• November 23, 1275 (Kenji 1, 5th day of the 11th month): Hirohito-shinnō was named Crown Prince and heir to his first cousin, the Daikakuji-tō Emperor Go-Uda. This was the result of political maneuvering by Hirohito's father, the Jimyōin-tō Emperor Go-Fukakusa.^[4]
• 1277 (Kenji 3, 5th month): Yoshimasa laid down his office.^[5]