Soun's actions, including the capture of Odawara-jo Castle, were taken not only to defeat Chachamaru, but also to expand his own power.
小田原城奪取など、早雲の一連の行動は、茶々丸討伐という目的だけでなく、自らの勢力範囲を拡大しようとする意図もあったと見られていた。