Due to the fact that Nobutora supported Zentokuji Shoho (later known as Yoshimoto IMAGAWA) at the Hanakura no Ran (Hanakura Rebellion) which occurred after the death of Ujiteru IMAGAWA in Suruga Province in 1536, the relationship with the Imagawa clan took a favorable turn.
翌天文5年には駿河で今川氏輝死後に発生した花倉の乱で善徳寺承芳（のちの今川義元）を支援したことにより今川氏との関係は好転する。