From the 1910s to the mid-1930s, the flamboyant and gifted spiritualist Deguchi Onisaburo (1871-1948) transformed his mother-in-law's small, rural religious following into a massive movement, eclectic in content and international in scope. Through a potent blend of traditional folk beliefs and practices like divination, exorcism, and millenarianism, an ambitious political agenda, and skillful use of new forms of visual and mass media, he attracted millions to Oomoto, his Shintoist new religion. Despite its condemnation as a heterodox sect by state authorities and the mainstream media,...