He was the third Prince of Emperor Murakami and his mother was FUJIWARA no Masahime (the daughter of FUJIWARA no Arihira, Sadaijin, the minister of left), who was koi (a court lady waiting in the court).
村上天皇の第三皇子、母は更衣(女官)藤原正妃（左大臣藤原在衡女）。