However, when Gonomiya, the Emperor's fourth son (later Imperial Prince Asahito and still later Emperor Higashiyama) was born in 1674, the Emperor began to think of having Gonomiya, rather than four years old Ichinomiya, succeed his throne.
ところが、延宝3年（1674年）に第4皇子である五宮（後に朝仁親王と命名、後の東山天皇）が誕生すると、天皇は当時4歳の一宮よりも五宮に皇位を継がせたいと考えるようになる。