Author of many Japanese books about his interesting experiences in the afterlife realms and beyond by using the Hemi-Sync® technology, Mas is the president of the Aquavision Academy and was born in Yokosuka, Japan in 1954. After graduating from the University of Tokyo, he worked for Sony for 10 years and SDL in San Jose, California for 13 years as a semiconductor laser engineer. At the age of 46, he decided to change the course of his life and started to research the area in which he had been interested, spiritual realm.