A prince of the Emperor Junna, the Imperial Prince Tsunesada (his mother was the Imperial Princess Masako, a princess of the Emperor Saga) became the Togu (the Crown Prince) of the Emperor Ninmyo.
仁明天皇の東宮には淳和上皇の皇子恒貞親王（母は嵯峨天皇の皇女正子内親王）が立てられた。