Born in Fukushima, Japan, his first contact with aikido was in 1963 at the Asia University in Tokyo where he followed a class taught by Nobuyoshi Tamura. The next year, Tamura introduced him to the Aikikai Hombu Dojo where he started training assiduously under Morihei Ueshiba, Kisshomaru Ueshiba and other prominent Hombu instructors. He officially became an uchideshi in 1967 after graduating from university.
On 19 April 1970, shortly after the death of Morihei Ueshiba, Suganuma was sent to Fukuoka by Kisshomaru Ueshiba as the Aikikai's representative for the Kyūshū district. He is the founder and dojocho of Aikido Shoheijuku Dojo, which today encompasses about 70 dojo and 4000 students. Although primarily based in Fukuoka, he is regularly invited to give aikido seminars around the world. Seminar locations have included Vancouver, Norway, the Netherlands, Israel, and Beijing.
- aikidoonline.com interview
- Shoheijuku interview page at the Wayback Machine (archived November 5, 2002)
- Hiroshima U. shoheijuku (in Japanese)
- Aikido Shoheijuku Dojo at the Wayback Machine (archived December 4, 2002)
- aikidojournal.com bio