In 1575, a bereaved child of Naochika, Naomasa II (later, he became one of Tokugawa-shitenno [four generals serving Tokugawa Ieyasu]) left Naotora, who was raising him as his foster mother, and relied on Ieyasu TOKUGAWA who conquered the Imagawa clan.
1575年（天正3年）、養母の直虎に育てられていた直親の遺児の井伊直政（後に徳川四天王の1人となる）は今川氏を滅ぼした徳川家康を頼る。