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.