There are approximately 90 U.S. military facilities including major military bases throughout mainland Japan and Okinawa, with an area total of 3,130,000 sq.meters, 75% of which are in Okinawa.Do US citizens need a visa for Japan?
Although the United States has an agreement with Japan that allows visitation for tourist purposes without the need to apply for a visa, American citizens need to carry a valid passport for proof of citizenship. You can legally stay as a tourist in Japan for up to 90 days, but Americans cannot engage in work-related activity during their trip.What are the US Army bases in Japan?
Misawa Air Base. Is military base in Japan. Misawa Air Base is the home for 35th Fighter Wing which is situated in the northern side of Japan and is the only joint service unit in Western Pacific which is a home to the US Army, US Navy, US Air Force and Japan Defense Forces which can be seen once in a while.