According to legend, it is a famous episode of showing Nobuhide's character as busho that on the occasion of seizing Nagoya-jo Castle, Nobuhide approached Ujitoyo IMAGAWA, the lord of the castle and a brother-in-law of Owari Shugo Yoshimune SHIBA, friendlily in advance, and after he became a friend of playing renga (linked verse) and put off Ujitoyo's guard, he captured the castle with a subtle stratagy.
那古野城の奪取にあたっては、信秀はあらかじめ城主で尾張守護の斯波義統の妹婿にあたる今川氏豊に友好的に接近、連歌などの友人となってこれを油断させた後、奇策をもって攻略したと伝えられており、信秀の武将としての性格を示す有名なエピソードになっている。