Kammala jumla mai zuwa: Kusa da ƙarshen Yaƙin Duniya na Biyu a watan Yulin 1945, an sake kiran Sasaki zuwa aiki, kuma an nada shi kwamandan sabon rukunin na 149, wanda ke zaune a Manchuria. Rukunin bai taba ganin yakin ba a lokacin
Soviet mamaye yankin kuma an kwashe makaman a ranar 23 ga watan Agusta, bayan haka sojojin Soviet suka kama Sasaki. An mika shi ga hukumomin kwaminisanci na kasar Sin a watan Yulin 1950, wanda ya tsare shi a Cibiyar Kula da Laifukan Yakin Fushun da ke lardin Liaoning. Ya mutu a can daga zubar da jini a cikin kwakwalwa a ranar 30 ga Mayu, 1955.