June 29, 2018 SecDef James Mattis Visits Japan Secretary of Defense James N. Mattis is greeted by, from left, U.S. Marine Corps Brig. Gen. Christopher J. Mahoney, USFJ deputy commander, Koku-Jieitai Lt. Gen. Hiroaki Maehara, Air Defense Command commander and U.S. Air Force Lt. Gen Jerry P. Martinez, U.S. Forces-Japan commander after landing at