When asked what might be the most beautiful word in Shimamuni, the Indigenous language variety spoken on Okinoerabu Island in Kagoshima prefecture of southwestern Japan, Nami Sao pondered for a moment before replying 'mihedirodoo.' Her husband, Tomoyuki Sao, is quick to elaborate that its utterance is always enlivened with a smile and tends to make fellow Shimamuni speakers noticeably more pleased than arigatou, the standard Japanese equivalent for saying thank you.

Even though both Nami and Tomoyuki were born on Okinoerabu Island (currently home to only 12,000 inhabitants), neither learned to speak Shimamuni – a local variety of the Kunigami language – fluently as children.