It is uncertain whether a child between a female member of the Imperial Family and a male member of a non-Imperial Family member obtains the right to succeed the throne or not; the person whose mother is a member of the Imperial Family was regarded nobler than their general peers, so called `Miyahara' (born to a female member of the Imperial Family).
女性皇族と非皇族男子との間の子に皇位継承権がなかったとの事実も、あったとの事実もまた確認されていないが、当時女性皇族を母に持つ人間は「宮腹」と呼ばれ、普通の貴族より高貴な存在と目されていた。