Jamboree used in English, as a borrowed foreign word, with the ending -ree. The word Jamboree is a transitive verb with a direct action of the primary word Jambo. For example, an attendee of a Jambo is a Jamboree. The word "Jamboree" is used primarily by the Scouting program before the first Boy Scout "Jamboree" in 1920. The word has also come to mean "a lavish or boisterous celebration or party" outside of the Scouting program. Baden-Powell deliberately chose the name "Jamboree" where attendees were warmly welcomed attending this first Boy Scout rally or meeting with the word "Jambo!" Many, at
International Boy Scouts, Troop 1 The Troop joined with Japanese and American Scouts on September 24–25, 1949 in Tokyo for the first postwar All-Japan camp held by the Boy Scouts of Japan to celebrate the reorganization of the Japanese Scout association. The camporee was organized with the cooperation of the American occupation forces, who had formed their own Scout troops. It was held at Doolittle Field, now called Hibiya Koen, in Tokyo. The Boy Scouts of Japan were readmitted as a full member of the WOSM on June 30, 1950. In July the IBS joined the Kanagawa Scouts for a camporee to celebrate the Japanese