At that time, the Ikeda clan was a sworn allies of the Miyoshi clan, but the next year, after Nagayoshi MIYOSHI's death the Miyoshi clan lost power, so Katsumasa fought against Hisahide MATSUNAGA in cooperation with Miyoshi Sanninshu (Miyoshi Triumvirate).
この頃の池田氏は三好氏の盟友であったが、翌年の三好長慶の死去によって三好氏が弱体化すると、勝正は三好三人衆と組み松永久秀と戦った。