In the 12th century, Buddhism was still a relatively new religion in Japan. At that time, one school (Shingon) offered extensive training in complex and very demanding practices which might eventually bring about spiritual purification and realization. Various Zen schools offered students a lengthy path, literally composed of a blank wall and unceasing meditation. Yet another school (Tendai) emphasized complex metaphysics and the study of philosophical systems. Basically, all of them were designed to cater to the few who were able to give up...
