Mahou Nyumon. Written by W.E. Butler. Translated by Onuma Tadahiro. Published by Kadokawa Shoten. 1974.
Mahou Nyumon (roughly translated as "The Introduction to Magic") consists of the translation of two books by W.E. Butler, Magic: its Ritual, Power and Purpose and The Magician: his Training and Work. I read the book so many times that the cover got tattered, repaired and again tattered .... This book was the starting point for the Japanese students who by their fates or tastes somehow adopted the Western Esoteric Tradition for their spiritual pursuits.