Hashimoto Tetsuichi Sensei is a resident of Tokyo, and he is one of the most senior disciples of Nakamura Tempu Sensei, founder of the Shin-Shin-Toitsu-Do system of Japanese yoga. He started his study of Shin-Shin-Toitsu-Do directly under Nakamura Sensei in 1950. Nakamura Tempu Sensei continued to be Hashimoto Sensei's primary teacher until he passed away in 1968 at the age of 92. Hashimoto Sensei holds the highest lectureship position in the Tempu-Kai (Tempu Society), and he has taught Shin-Shin-Toitsu-Do in Japan and the Philippines, where he was the Director of the Japanese Studies Program at Ateneo de Manila University.

Hashimoto Sensei is a retired professor of political science for International Christian University in Japan. He attended Duke University from 1954 to 1958 for graduate studies, and he was a visiting professor for the Japanese Studies Program at De La Salle University in 1985.

In addition to his position on the Sennin Foundation, Inc. Board of Advisors, he is the Senior Advisor to the Sennin Foundation Center for Japanese Cultural Arts and the teacher of H. E. Davey Sensei.