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 particular, represents almost every strand of Buddhist teachings and practices. However, in comparison to Chinese or Korean Buddhist schools that are generally more united and less sectarian in their groupings, Buddhist denominations in Japan have developed into independent sects with autonomous organizations that have differing emphases on the doctrine and separate lay followings." (Authors: Kawananami, Partridg, and Woodhead page 82.)]In the post-Meiji, pre-WWII period, there were officially 13 schools and 56 branches () of traditional Buddhism (i.e., those not established in modern times). The official schools included three from the Nara period, two from the Heian period (Tendai and Shingon),