Sanada Yukimura
Following the Osaka Campaign, Shigenaga married a daughter of Sanada Yukimura and his wife, Chikurin-in (Ōtani Yoshitsugu's daughter and adopted daughter of Toyotomi Hideyoshi), and adopted their second son, Sanada Daihachi, later known as "Katakura Heinosuke Morinobu". He also assisted many of the masterless former Sanada retainers.