 In 1922, Norihiro Yasue and Koreshige Inuzuka, head of the Imperial Japanese Navy's Advisory Bureau on Jewish Affairs, returned from their military service in Siberia to provide aid to the White movement against the Red Army.They became particularly interested in Jewish affairs after having learned of "The Protocols of the Elders of Zion".Over the course of the 1920s, they wrote many reports on the Jews, and traveled to Mandatory Palestine to research them and to speak with Zionist leaders Chaim Weizmann and David Ben-Gurion.