On September 23, 1205 (in some theories, on September 18), Tomomasa was killed in Heian-Kyo (present Kyoto City) by Michimoto YAMAUCHISUDO (Tsunetoshi's son) under an order from Yoshitoki HOJO, who at that time, had already gripped the real power of the bakufu.
朝雅も8月2日（閏7月26日とも）に平安京で、幕府の実権を握った北条義時の命をうけた山内首藤通基（経俊の子）によって殺害された。