He was born between his father, Imperial Prince Tamehira (952－1010), who had titles of the Fourth Imperial Prince, Ippon rank (First Order of an Imperial Prince), and Shikibu kyo (Minister of the Ministry of Ceremonial) and his mother, the daughter of MINAMOTO no Takaakira, who had the title of Sadaijin (Minister of the Left).
村上天皇の第四皇子・一品式部卿為平親王（952－1010）を父として、左大臣源高明女を母として生まれる。