|King of Ryūkyū|
|Died||October 10, 1313(aged 44–45)|
He was the third ruler of Eiso Dynasty; that is, his grandfather was King Eiso and his father was King Taisei. The five years of Eiji's reign were uneventful, but after his death, the island was split into three polities. Eiji was the father of Tamagusuku.
- Kerr, George H. (1965). Okinawa, the History of an Island People. Rutland, Vermont: C.E. Tuttle Co. OCLC 39242121
- Nussbaum, Louis-Frédéric. (2002). Japan Encyclopedia. Cambridge: Harvard University Press. ISBN 978-0-674-01753-5; OCLC 48943301