Nishi and Uranus participated in the 1936 Summer Olympics in Berlin, Germany but Nishi fell off his horse mid-course. There is speculation this was intentional and done for the benefit of host country Nazi Germany, with whom Japan would sign the 1940 Tripartite Pact, forming the Axis Powers. The 1936 Show Jumping individual event gold medal was won by Germany. Following this, Nishi was reposted to the Tokachi Subdivision of the department responsible for supply of military horses. He was promoted to major in March 1939.