History of Japan men instead joined forces with Emperor Go-Daigo and overthrew the Kamakura shogunate. Japan nevertheless entered a period of prosperity and population growth starting around 1250. In rural areas, the greater use of iron tools and fertilizer, improved irrigation techniques, and double-cropping increased productivity and rural villages grew. Fewer famines and epidemics allowed cities to grow and commerce to boom. Buddhism, which had been largely a religion of the elites, was brought to the masses by prominent monks, such as Hōnen (1133–1212), who established Pure Land Buddhism in Japan, and Nichiren (1222–82), who founded Nichiren Buddhism. Zen Buddhism spread widely among
Buddhism in Japan when King Seong of Baekje (聖明王, now western Korea) sent a mission to the Emperor Kinmei that included Buddhist monks or nuns together with an image of Buddha and a number of sutras to introduce Buddhism. The powerful Soga clan played a key role in the early spread of Buddhism in the country. Initial uptake of the new faith was slow, and Buddhism only started to spread some years later when Empress Suiko openly encouraged the acceptance of Buddhism among all Japanese people. According to legend, in Japan in 552, there was an attempt to destroy a tooth relic, one