To prevent the dispute against Emperor Saga of Imperial succession, there was an agreement to share Imperial succession from both direct Imperial lines, in fact, the succession was conducted such as Emperor Saga - Emperor Junna - Emperor Ninmyo (Emperor Junna's child), after Emperor Ninmyo, Imperial Prince Tsunesada (Emperor Junna's child, his mother was Emperor Saga's Princess) was appointed as Crown Prince.
嵯峨と皇位継承紛争を防ぐために、それぞれの直系を互いに皇位につける迭立（てつりつ）を採用することとし、実際、嵯峨－淳和－仁明天皇（嵯峨の子）と皇位継承され、仁明の次も恒貞親王（淳和の子、母は嵯峨の皇女）が皇太子に立てられていた。