Kazuo Odachi joined the Japanese navy during World War II at the age of 16, becoming a pilot in the Kamikaze Special Attack force. He completed 8 suicide missions without spotting a target. After surviving the war, he returned to Japan and became a police officer in the Tokyo Metropolitan Police Department, and then a detective retiring as a Director in the 3rd Investigation Division of the Criminal Affairs Bureau. Having possessed a passion for Kendo since he was a youth, he has taught the art to children for the last 33 years.

Author and Translator Shigeru Ohta, is a former prosecutor, having worked for 34 years at the Ministry of Justice in Tokyo, Osaka, and other cities. He taught law at Waseda University for 5 years and is currently a professor in the Department of Crisis Management at Nihon University.

Hiroyoshi Nishijima worked for the Yomiuri newspaper in Tokyo, retiring as Chief of the Editorial Bureau. He is currently a member of the Japan National Press Club and the Editorial Committee of the Shibat Ryotaro Memorial Foundation magazine Ryo.

Alexander Bennett is a professor of Japanese history, martial arts and Budo theory at Kansai University. He co-founded and publishes Kendo World, the first English-language journal dedicated to Kendo. He holds black belts in several martial arts. His published works include Japan: The Ultimate Samurai Guide, The Complete Musashi and Hagakure: The Secret Wisdom of the Samurai.