“Many women come from outside the island, which further contributes to the replacement of Dunan by Standard Japanese. Within most Yonaguni families, the inter-generational transmission of the language has been long interrupted, and the total number of Dunan speakers is steeply decreasing.”

"A few Dunan texts in phonemic script with word-by-word glosses in Japanese can be found in Hirayama and Nakamoto (1964, with accompanying sonosheets), Shibata (1972, with audio tapes and a re-edition as CD-ROMs), and Kajiku (2002). Fukuda et al. (1983) is the largest collection of Dunan texts, but it adopts an inconsistent orthography and has no glosses but only free translations in Japanese."

"Mainly adults."

"Also use Japanese [jpn]."

"Younger Yonaguni speakers are L1 Japanese speakers, and L2 Yonaguni learners (most people under 40 who learn are involved in traditional Okinawan culture, like the theater, with a growing number of language activists). And basically no children learn it at home from their parents, though there have been efforts to establish a language nest."

"'Language nest' is implemented at the community level, though the government has issued statements that it is certainly not opposed."

"Yonaguni was written before the mid-1800s in what are called Kaidā logograms. It's still not clear how full of a writing system it was, but they were certainly used in local record-keeping, and resemble Oracle Bone script, at least in usage." Contemporary speakers write using kana though they don't write much.