The present study relates to Japanese Buddhism, as in Japan alone the whole of Buddhism is preserved. The author presents Buddhist Philosophy in an ideological sequence and not in its historical sequence. Divided into 15 chapters, the book deals with different schools of Buddhist Philosophy. The author has grouped these schools under two heads: (1) the schools of negative rationalism, i.e. the religion of Dialectic Investigation, and (2) the schools of Introspective Institutionalism, i.e. the Religion of Meditative Experience. This book was originally published in 1947.