Eiji (えいじ, エイジ) is a common masculine Japanese given name.
Eiji can be written using different kanji characters and can mean:
The name can also be written in hiragana or katakana.
The Eiji (era) (永治, eternal peace) was a Japanese era name (年号,, nengō,, literally "year name") after Hōen and before Kōji. This period spanned the years from 1141 through 1142.
Eiji (永治) was a Japanese era name (年号,, nengō,, lit. "year name") after Hōen and before Kōji. This period spanned the year from July 1141 through April 1142. The reigning emperors were Sutoku-tennō (崇徳天皇) and Konoe-tennō (近衛天皇).
Eiji (英慈, r. 1309-1314) was a king of the Ryūkyū Islands.
He was the third ruler in the Eisō lineage of monarchs; that is, his grandfather was King Eiso 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 into three kingdoms.
Eiji was the father of Tamagusuku, who would become the first monarch of the kingdom of Chūzan in central Okinawa.