Later in the Nanbokucho era (the Northern and Southern Courts period) (Japan), the Akamatsu clan greately prospered during the Muromachi period by becoming a follower of Takauji ASHIKAGA from early on after forsaking the Kenmu Restoration which was led by Emperor Godaigo.
その後の南北朝時代(日本)には、後醍醐天皇を中心とした建武の新政を見限り、早くから足利尊氏に従ったことから室町時代に赤松氏は大きく繁栄した。