This is the first book-length study in any language of J=o kei (1155-1213), a prominent Buddhist cleric of the Hoss=o (Yog=ac=ara) school, whose life bridged the momentous transition from Heian (794-1185) to Kamakura (1185-1333) Japan. "Kamakura Buddhism" has drawn notable scholarly attention, largely because it marks the emergence of new schools-Pure Land, Nichiren, and Zen-that came to dominate the Buddhist landscape of Japan. Although J=okei is invariably cited as one of the leading representatives of established Buddhism during the Kamakura period, he has been seriously neglected by Western scholars. In this book, James L. Ford aims to shed light on this pivotal and long-overlooked figure. Ford argues convincingly that J=okei is an ideal personage through which to peer anew into the socio-religious dynamics of early medieval Japan. Indeed, J=okei is uniquely linked to a number of decisive trends and issues of dispute including: the conflict between the established schools and H=onen's exclusive nenbutsu movement; the precept-revival movement; doctrinal reform efforts; the proliferation of prominent "reclusive monks" (tonseis=o); the escalation of fundraising (kanjin) campaigns and popular propagation; and the conspicuous revival of devotion toward 'Sákyamuni and Maitreya. J=okei represents a paradigm within established Buddhism that recognized the necessity of accessing other powers through esoteric practices, ritual performances, and objects of devotion. While J=okei is best known as a leading critic of H=onen's exclusive nenbutsu movement and a conservative defender of normative Buddhist principles, he was also a progressive reformer in his own right. Far from defending the status quo, J=okei envisioned a more accessible, harmonious, and monastically upright form of Buddhism. Through a detailed examination of J=okei's extensive writings and activities, Ford challenges many received interpretations of J=okei's legacy and the transformation of Buddhism in early medieval Japan. This book fills a significant lacuna in Buddhist scholarship