Yonaguni Language - Phonology

Phonology

In the Yonaguni language, as well as in Miyako, Yaeyama, and other Southern Ryukyuan languages, /b/ is cognate with Standard Japanese /w/. Yonaguni also has /d/ where Japanese and other Ryukyuan languages have /j/. Thus, for example, Yonaguni /dami(-n)/ ('to hurt, to ache') is cognate with the archaic or dialectal Japanese verb /jame(-ru)/ ('to hurt, to ache') rather than with Japanese /itam(-u)/ (same meaning). Yonaguni /d/ is probably a recent development from an earlier */j/, however, judging from the fact that even the */j/ in loanwords of Sinitic origin is pronounced /d/ by speakers of the Yonaguni language.

Yonaguni language also exhibits intervocalic voicing of plosives, as do many dialects of Japanese.

It was once written with the Kaidā logograms.