In March 1938, the Japanese provided reassurances to the IOC at the organization's Cairo conference that Tokyo would still be able to serve as the host city. However, many Diet members in Japan had already openly questioned hosting the Olympics in wartime, and the military was unreasonably demanding that the organizers build the venues from wood because they needed metals for the war front. In July, a legislative session was held to decide the matters of the Summer and Winter Olympics and the planned 1940 World's Fair all at once. The World's Fair was only "postponed", under a belief that Japan would be able to wrap up the war, but the Olympics could not be moved and was canceled.