The Miyakoan language (宮古口/ミャークフツ Myākufutsu/Myākufutsї [mjaːkufutss̩] or 島口/スマフツ Sumafutsu/Sїmafutsї, Japanese: 宮古語, romanized: Miyako-go) is a diverse dialect cluster spoken in the Miyako Islands, located southwest of Okinawa. The combined population of the islands is about 52,000 (as of 2011). Miyakoan is a Southern Ryukyuan language, most closely related to Yaeyama. As of 2025, the number of competent native speakers is not definitively known. As a consequence of the Japanese government's Japanese language policy, which has traditionally referred to the language as 宮古方言 (Miyako hōgen), or simply a dialect of standard Japanese, it is not taught or used in schools. As a result, most people born after 1970 tend to not use the language except in songs and rituals, and the younger generation almost exclusively uses Japanese as their first language. UNESCO classified Miyakoan as a "definitely endangered" language in its Atlas of the World's Languages in Danger in February, 2009. The Endangered Languages Project currently classifies the language as "severely endangered."
Miyakoan is notable among the Japonic languages in that it allows non-nasal syllable-final consonants, something not found in most Japonic languages.
