Kagoshima Prefecture, north Okinawa, south Amami-Oshima, Kakeroma, Yoro, and Uke islands.
None known. Inherent intelligibility low with other Ryukyuan languages and Japanese [jpn].
Those over 50 use vernacular at home, but understand and use standard Japanese. Those 20–50 understand the vernacular, but mainly speak Japanese. Also use Japanese [jpn].