Jōkei and Buddhist Devotion in Early Medieval Japan - James L. Ford - Google Books

http://books.google.de/books?id=ACnfqhZUgXYC&pg=PA90&lpg=PA90&dq=Potalaka+im+Avatamsaka+Sutra&source=bl&ots=PLtGFcAteK&sig=m1ARF

This is the first book-length study in any language of Jō kei (1155-1213), a prominent Buddhist cleric of the Hossō (Yog=ac=ara) school, whose life bridged the momentous transition from Heian (794-1185) to Kamakura (1185-1333) Japan. "Kamakura Buddhism"…