At that time the sorinin of the Sumitomo Family, Saihei HIROSE, and the manager of the Osaka main office, Teigo IBA, decided that Tomochika's wife Toku would succeed to the name of the fourteenth-generation Kichizaemon on one hand and that Takamaro TOKUDAIJI, from the Seiga Family, would be adopted as son-in-law to marry Tomotada's younger sister Masu, whereby the bloodline of the Sumitomo Family could be successfully maintained.
この時、住友家総理人広瀬宰平と大阪本店支配人伊庭貞剛は、友親の妻・登久に14代目吉左衛門を襲名させる一方、友忠の妹・満寿の婿養子として清華家の徳大寺隆麿を迎え、住友家の命脈をつないだ。