The core of Eisa consists of "nembutsu" songs. The "Ryūkyū-koku yuraiki" (1713) attributes the introduction of nembutsu to Taichū (1552–1639), a Jōdo sect monk from Mutsu Province. According to the record, he translated Buddhist teaching into the vernacular speech and taught it to the people of Naha during the reign of Shō Nei. Other sources confirm that Taichū stayed in the capital region for three years in the early 1600s and converted the king and other high-ranking officials. Some researchers speculate that he introduced "odori nembutsu" or dancing nembutsu to Naha. However, Taichū's teaching did not prevail; it was barely carried on by his followers in Kakinohana, Naha.