Imperial Prince Osabe and Imperial Princess Sakahito were born between Shirakabe no okimi and the Imperial princess Inoe and he was the last male member of the imperial family Emperor Tenmu, though Imperial Prince Osabe himself was the maternal side of the family, so it is believed that his father, Shirakabe no okimi, was recommended as the next heir to the Imperial Throne.
白壁王と井上内親王の間には他戸親王と酒人内親王が生まれており、特に、他戸王は女系ではあるものの天武天皇系男性皇族の最後の一人であるということから、その父親である白壁王が次期皇位継承者として推挙されたと考えられている。