1141-1215. The founder of the Rinzai sect of Buddhism and of Jufuku-ji temple in Kamakura and Kenni-ji temple in Kyoto. His name is also read as 'Eisai'. He visited Sung Dynasty China and in Kenkyu 2 (1191) he brought back the Sung Dynasty's method of making and drinking tea. He also wrote Kissa Yojoki (Preservation of Health through Drinking Tea) explaining the medicinal effects of drinking tea. This had a great influence on the subsequent popularization of tea.