In 1335, in response to Takauji ASHIKAGA, a rebellion occurred in Bicchu Province and Takanori went there to suppress it, but he eventually lost his foothold, Mitsuishi-jo Castle in Bizen Province, as well as most of his family members due to betrayal of his vassals.
建武(日本)2年（1335年）、足利尊氏に呼応して備中国で反乱が起こり高徳が討伐に向かうが、却って拠点であった備前三石城を奪われた上に配下の内応によって一族の大半が討たれてしまう。