Genealogy
He was the second son of Emperor Kinmei. His mother, Ishi-hime, was a daughter of Emperor Senka.
Although he had many children, none of them would ever become Emperor. According to Gukanshō, Bidatsu had four empresses and 16 Imperial children (6 sons and 10 daughters).
Bidatsu's first empress, Hirohime, died in the fifth year of his reign. To replace her, he elevated one of his consorts, Princess Nukatabe, to the rank of empress. Nukatabe was his half-sister by their father Kinmei. Later she ascended to the throne in her own right and is today known as Empress Suiko.
He was succeeded first by one of his brothers, Emperor Yōmei, then by another, Emperor Sushun, and then Empress Suiko, his sister and wife, before his grandson, Emperor Jomei, eventually took the throne.
Empress: Hirohime (広姫; d.575), Prince Okinaga-no-Mate's daughter
First Son: Prince Oshisako no Hikohito no Ōe (押坂彦人大兄皇子; b.556)
Princess Sakanobori (逆登皇女)
Princess Uji (菟道皇女), Saiō
Empress: Princess Nukatabe (額田部皇女), later Empress Suiko, Emperor Kinmei's daughter
Princess Uji no Kaitako (菟道貝蛸皇女; b.570), married to Prince Shōtoku
Prince Takeda (竹田皇子)
Princess Oharita (小墾田皇; b.572), married to Prince Oshisako-no-Hikohito-no-Ōe
Princess Umori (鸕鶿守皇女)
Prince Kazuraki (葛城王)
Prince Owari (尾張皇子), father of Tachibana-no-Oiratsume (Prince Shōtoku's consort)
Princess Tame (田眼皇女), married to Emperor Jomei
Princess Sakurai no Yumihari (桜井弓張皇女), married to Prince Oshisako-no-Hikohito-no-Ōe, later married to Prince Kume (Emperor Yomei's son)
Consort: Kasuga-no-Ominako-no-Iratsume (春日老女子), Kasuga no Nakakimi no Omi's daughter
Prince Naniwa (難波皇子; 560-587)
Prince Kasuga (春日皇子; 560-615)
Princess Kuwata (桑田皇女)
Third Son: Prince Ohomata (大派皇子; b.585)
Concubine: Unako no Otoshi (菟名子), Ohoka no Obito no Okuma's daughter
Princess Futohime (太姫), also 桜井皇女
Princess Nukatehime (糠手姫皇女; 570-664), married to Prince Oshisako no Hikohito no Ōe
