Masahiro SAIMURA, also a member of the Akamatsu family and was the lord of Takeda-jo Castle in Tajima Province, switched to the East squad from the West squad as well, but after the battle (Battle of Sekigahara) he was ordered to kill himself by Ieyasu Tokugawa, for the charge that Masahiro seriously damaged the castle town by setting fire brutally when he attacked Nagafusa MIYABE of the West squad at his home castle, Tottori-jo Castle, (for this incident, the theory of the false accusation caused by Koremori KAMEI, who encouraged the betrayal and shifted the responsibility is highly likely), and with Masahiro's death, the Akamatsu clan as daimyo had distinguished.
同じく赤松一族で但馬竹田城城主・斎村政広も西軍から東軍に寝返ったものの、西軍に与した宮部長房の居城・鳥取城を攻めるときにあまりに手ひどく城下町を焼き払ったために、徳川家康から戦後、これを理由に自害（この件に関しては寝返りを促した亀井茲矩に責任転嫁された冤罪説が強い）を命じられてしまい、これにより大名としての赤松氏は滅亡したのである。