Kaidā glyphs

Kaidā glyphs (カイダー字, Kaidā ji) are a set of pictograms once used in the Yaeyama Islands of southwestern Japan. The word kaidā was taken from Yonaguni, and most studies on the pictographs focused on Yonaguni Island. However, there is evidence for their use in Yaeyama's other islands, most notably on Taketomi Island. They were used primarily for tax notices, thus were closely associated with the poll tax imposed on Yaeyama by Ryūkyū on Okinawa Island, which was in turn dominated by Satsuma Domain on Southern Kyushu.