Report of the U.S. War Department General Staff, Military Intelligence Division. This document states that there is reliable information that there is a secret Japanese military force of more than 25,000 members in the vicinity of São Paulo City. It can be assumed that the arrest of the Jinsaku Wakiyama, retired Japanese colonel and chairmen of the Bastos Industrial Cooperative, was based on this information. Naotaka Utsunomiya, military attaché in Brazil, wrote in his memoirs that he was interrogated by the police, which asking him, "We have information that there is a guy introducing himself as a Japanese Army captain in São Paulo who mustered young people of Japanese descent to stir unrest, do you have any connection with this guy?". Such a hysterical reaction within the U.S. Army ceased occurring after the threat of the Japanese Army to the U.S. mainland and the Panama Canal disappeared with the victory at the Battle of Midway.
