Eastern Old Japanese

Eastern Old Japanese
Eastern provinces (hatched) in the 8th century
Region	Eastern Japan
Era	4th–9th century
Language family	Japonic Old Japanese Eastern Old Japanese
Early form	Proto-Japonic
Language codes
ISO 639-3	–

Eastern Old Japanese (abbreviated as EOJ. Japanese: 上代東国方言, 上代東国語) is a group of heterogenous varieties of Old Japanese, historically spoken in the east of Japan, in the area traditionally called Togoku or Azuma.