was a king of the Ryūkyū Islands

Ryukyu Islands

The , also known as the , is a chain of islands in the western Pacific, on the eastern limit of the East China Sea and to the southwest of the island of Kyushu in Japan. From about 1829 until the mid 20th century, they were alternately called Luchu, Loochoo, or Lewchew, akin to the Mandarin...

.

He was the third ruler in the Eisō lineage of monarchs; that is, his grandfather was King Eiso

Eiso (Ryukyu)

' , also known as Yingzu, was a king of the Ryūkyū Islands.Eisō was a member of the Tenson family; and he is also known as the first of the Eiso Lineage of Ryukyuan monarchs...

 and his father was King Taisei. The five years of Eiji's reign at Shuri were uneventful, but after his death, the island was split between into three kingdoms.

Eiji was the father of Tamagusuku

Tamagusuku

was a king of the Ryūkyū Islands.Tamgusuku was a "king" of the Okinawan kingdom of Chūzan from roughly 1314-1336.He was the third son of Eiji , he was the fourth ruler of the lineage of Eiso was a king of the Ryūkyū Islands.Tamgusuku was a "king" of the Okinawan kingdom of Chūzan from roughly...

, who would become the first monarch of the kingdom of Chūzan

Chuzan

Chūzan was one of three kingdoms which controlled Okinawa in the 14th century. Okinawa, previously controlled by a number of local chieftains or lords, loosely bound by a paramount chieftain or king of the entire island, split into these three more solidly defined kingdoms within a few years after...

in central Okinawa.