A map of the Okinawan Islands displaying the distribution of the Northern Okinawan Language (Kunigami) in blue, and the South-Central Okinawan Language (Shuri-Naha) in red. The darker areas represent regions that have been officially classified by the following sources:
Lewis, M. Paul (2009). "Ethnologue report for Japan".  Ethnologue: Languages of the World, Sixteenth edition. Dallas, Texas: SIL International.
Pellard, Thomas (2009). "Ogami: Éléments de description d'un parler du sud des Ryukyus". École des hautes études en sciences sociales. Paris, France.
Curry, Stewart A. (2004). "Small Linguistics: Lexical Loans in Nakijin Dialect Okinawan". University of Hawaii Library.
Map_of_Okinawa_Prefecture_Ja.svg
Map_of_Okinawa_Prefecture_Ja.svg: ja: 利用者:Lincun
derivative work: Io Katai (talk)