According to "Nagoya Kassen-ki" (Records of battles in Nagoya), Ujitoyo enjoyed renga (linked verse) very much, and Nobuhide, who set his eyes on this, participated frequently in the renga-kai (a gathering of linked verse) held at Nagoya-jo Castle by sojourning for days eventually earned the trust of Ujitoyo.
『名古屋合戦記』によると、氏豊が連歌を非常に好み、そのことに目をつけた信秀が那古野城に催される連歌会に足繁く通い何日も逗留するようになり、氏豊に信用されるようになった。