However, because Hideyoshi sent his biological mother, Omandokoro (the honorary term for her), to Okazaki-jo Castle on October 18 (in the old calendar) as a hostage, Ieyasu made up his mind to become a vassal of Hideyoshi.
しかし10月18日、秀吉が生母・大政所までも人質として岡崎城に送ってきたため、遂に秀吉に臣従することを決意する。