After the war, Horikoshi participated in the design of the YS-11 with Hidemasa Kimura. He subsequently left Mitsubishi and taught at educational and research institutions. From 1963 to 1965, he was a lecturer at the University of Tokyo's Institute of Space and Aeronautics, and was subsequently a professor at the National Defense Academy from 1965 to 1969. Between 1972 and 1973, he was a professor of the Faculty of Engineering of Nihon University.
