Tokunoshima language

Okamura (2007) posits two divisions of Tokunoshima: Kametsu–Amagi in the north and Isen in the south.

1936 in Asama, Amagi Town), the speakers of Tokunoshima call their tongues sïmagucï, which consists of two morphemes.

The second part kucï (Standard Japanese kuchi) means a mouth, and by extension, speech.

Note that sïmagucï is more strongly associated with the former because the speakers of Tokunoshima are fully aware that each shima has a distinct language.

[4] As with most Ryukyuan languages to the north of Central Okinawan, stops are described as "plain" C’ and "glottalized" C‘.