Ken'ei
16 April 1206 (Ken'ei 1, 7th day of the 3rd month): The emperor planned to pay a visit to the Kujō Yoshitsune, but in the night before this visit, an unknown assassin killed  Yoshitsune.  After the killing, Konoe Iezane was made sesshō (regent) and Fujiwara no Tadatsune was made the  Minister of the Left (sadaijin).