After 1936 Summer Olympics, Horie retired from his playing career and joined the Asahi Shimbun. In 1951, he became a professor at his alma mater, Waseda University. He also became a manager for Waseda University and instructed many international players like Shigeo Yaegashi, Saburo Kawabuchi, Masakatsu Miyamoto, Kunishige Kamamoto, and others.