His father was Emperor Higashiyama (Imperial Prince Takayoshi, or Takanaga), the first Emperor of the MIURA Imperial Line, and his mother was a daughter of Udaijin (Minister of the Right) Kinaki SAIONJI, 藤原清子, or Mikushigedono.
父は三浦皇統家第一代東山天皇（尊良親王）、母は右大臣西園寺公顕の女・藤原清子・御匣殿（みくしげどの）。