He is a German aircraft engineer and a founder of Junkerswerken. He was one of the mainstays of the German aircraft industry in the years of World Wars.
He signs a contract in 1925 with the company Mitsubishi Koukuuki. So Jiro Horikoshi and Honjo could travel to Nazi Germany for study. His models Junkers F.13 and Junkers G.38 help the Japanese company to design their own planes Mitsubishi G3M and Mitsubishi A5M.