Since it was described in "Tokitsugu Kyoki" (Dairy of Tokitsugu YAMASHINA) that when Tokitsugu YAMASHINA and Masatsuna ASUKAI taught kemari (a game played by aristocrats in the Heian period) at the Shobata-jo Castle to Nobuhide ODA and other Oda family members in 1533, Chikuomaru (Ujitoyo) IMAGAWA was also invited, which has prompted some to say that the takeover of Nagoya-jo Castle was in 1538.
天文2年（1533年）に尾張国に下向した山科言継と飛鳥井雅綱が勝幡城で織田信秀ら織田家家中に蹴鞠の指導をした際に今川竹王丸（氏豊）も招かれていたと『言継卿記』に記されていることから、那古野城の奪取の時期については天文7年(1538年)年説もある。