On July 1, 1186, after Yoshitsune, who came into conflict with his older paternal half-brother, MINAMOTO no Yoritomo, fled from Kyoto, Tokiwa was captured by Kamakura soldiers along with Yoshitsune's sister near Ichijo Kawasaki Kannondo Temple in Kyoto (Kano-ji Temple located on the west shore of the Kamo-gawa River (part of the Yodo-gawa river system) in the North-eastern part of Kyoto).
義経が異母兄である源頼朝と対立し、都を落ちたのちの文治2年（1186年）6月6日、常盤は京都の一条河崎観音堂（京の東北、鴨川(淀川水系)西岸の感応寺）の辺りで義経の妹と共に鎌倉方に捕らわれている。