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
Hayagriva (Buddhism) Japanese Mahayana Buddhism, Hayagriva is considered as a Avalokiteśvara with wrathful form (Batō Kannon 馬頭觀音, lit.Hayagrīva-Avalokiteśvara) , one of the six Avalokiteśvaras intended to save the sentient beings of the six realms: deities (deva), demons (asura), human beings, animals, hungry ghosts, beings of hell. Hayagriva's sphere is realm of animals (or beings whose state of mind are animal-like). In Folk religion in Japan, Hyagriva was also worshipped as the guardian deity for horses because of its name Horse-head (Batō). The horse was symbolized as a vehicle, not as one of Hayagriva's heads. In Chinese Buddhism and folk tradition, Hayagriva was