The Emperor escaped from Oki Province with help from the Nawa clan such as Nagatoshi NAWA as the message of 'as gods saved King Goujian of Yue, so they will never give up on you, and some faithful retainers like Fan Li shall come to save you' suggested, and when he raised an army at Mt. Senjo of Hoki Province, Takanori and his foster father joined the army and rendered distinguished military service in the war.
この時彫られた「天勾践を空しうすること莫れ、時に范蠡の無きにしも非ず」の言葉通り、翌年に名和長年ら名和氏の導きにより天皇が隠岐を脱出、伯耆国船上山において挙兵した際には、高徳も養父とともに赴いて幕府軍と戦い戦功を挙げたとされる。