Sadazane-shinnō Son of Emperor Seiwa (0876–0932) Parents Fujiwara no Morofuji's daughter (Kōi of Emperor Seiwa) Seiwa Children Minamoto no Shigehira Minamoto no Motosuke Siblings Shikishi-naishinnō Sadatoki-shinnō Sadakazu-shinnō Minamoto no Nagakazu Sadakata-shinnō Yōzei Atsuko-naishinnō Sadasumi-shinnō Sadahira-shinnō Minamoto Noriko Sadamoto-shinnō Sadayasu-shinnō