Wheat noodles in Japan (udon) were adapted from a Chinese recipe by a Buddhist monk as early as the 9th century. Reshteh noodles were eaten by the people of Persia by the 13th century. Innovations continued, as for example, noodles made from kudzu (naengmyeon) were developed in the Joseon Dynasty of Korea (1392–1897). Ramen noodles, based on Chinese noodles, became popular in Japan by 1900.