He graduated from the Shipbuilding Section, Tokyo University.
Kyoji Suehiro appointed assistant professor at the university (1902) and later professor. Taught at the university for 30 years. An expert on applied dynamics, he studied especially the strength and oscillation of the ship hull.
He helped establish and headed the Mitsubishi Shipbuilding Research Institute and the Seismological Institute of Tokyo University.
He died soon after a lecturing tour of the United States he made at the invitation of American scientific circles (1931).