Japan

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. They are concentrated in a few areas (prefectures), 37 in Okinawa, 15 in Kanagawa, 11 in Nagasaki, and 7 in Tokyo. About 52,000 U.S. troops are stationed in these bases, 26,000 in mainland and 25,000 in Okinawa (2001). In mainland Japan, the largest contingent is the air force with 6,600 and that in Okinawa marines (15,500).

The main U.S. bases in mainland Japan include Misawa airbase in Aomori Prefecture up in the north of Honshu Island, Yokota Airbase in Tokyo, Yokosuka naval base in Kanagawa Prefecture, Atsugi base in the same prefecture, Iwakuni marine base near Hiroshima, and Sasebo naval base in Nagasaki Prefecture. Also there are munitions depots, communication bases, port facilities, warehouses, military barracks, and residential estates.

http://www.jca.apc.org/wsf_support/2004doc/WSFJapUSBaseRepoFinalAll.pdf

Link to US Military Bases in Japan – An Overview

U.S. Military Bases in Japan and Okinawa

List of current facilities The U.S. military installations in Japan and their managing branches are:

Air Force:

• Camp Chitose, Chitose, Hokkaido
• Kadena Air Base, Okinawa Prefecture
• Kadena Ammunition Storage Area, Okinawa Prefecture
• Misawa Air Base, Aomori Prefecture
• Yokota Air Base, Fussa, Tokyo
• Fuchu Communications Station, Fuchu, Tokyo
• Tama Service Annex, Inagi, Tokyo
• Yugi Communication Site, Hachioji, Tokyo
• Camp Asaka AFN Transmitter Site, Saitama Prefecture
• Tokorozawa Transmitter Site, Saitama Prefecture
• Owada Communication Site, Saitama Prefecture
• Okuma Rest Center, Okinawa Prefecture
• Yaedake Communication Site, Okinawa Prefecture
• Senaha Communication Station, Okinawa Prefecture

Army:

• Fort Buckner, Okinawa Prefecture
• Camp Zama, Zama, Kanagawa
• Yokohama North Dock, Yokohama, Kanagawa Prefecture
• Sagami General Depot, Sagamihara, Kanagawa
• Sagamihara Housing Area, Sagamihara, Kanagawa
• Akizuki Ammunition Depot, Hiroshima Prefecture
• Hiro Ammunition Depot, Hiroshima Prefecture
• Kawakami Ammunition Depot, Hiroshima Prefecture
• Gesaji Communication Site, Okinawa Prefecture
• Army POL Depots, Okinawa Prefecture
• White Beach Area, Okinawa Prefecture
• Naha Port, Okinawa Prefecture
• Hardy Barracks, Roppongi, Tokyo
• Torii Station, Yomitan, Okinawa Prefecture, Japan

Marine Corps:

• Camp Smedley D. Butler, Okinawa, Yamaguchi Prefectures. Although these camps are dispersed throughout Okinawa and Japan they are all under the heading of Camp Smedley D. Butler):
• Camp McTureous
• Camp Courtney
• Camp Kinser
• Camp Hansen
• Camp Schwab
• Camp Shields
• Camp Gonsalves (Jungle Warfare Training Center)
• Kin Blue Beach Training Area
• Kin Red Beach Training Area
• NSGA Hanza
• Higashionna Ammunition Storage Point II
• Henoko Ordnance Ammunition Depot
• Camp Foster, Okinawa Prefecture
• Camp Lester, Okinawa Prefecture
• Marine Corps Air Station Futenma
• Yomitan Auxiliary Airfield
• Marine Corps Air Station Iwakuni
• Camp Fuji, Shizuoka Prefecture
• Numazu Training Area, Shizuoka Prefecture
• Tengan Pier
• Ie Jima Auxiliary Air Field, Okinawa Prefecture
• Tsuken Jima Training Area
• Kadena Ammunition Storage Area

Navy:

• Naval Air Facility Atsugi, Ayase, Kanagawa
• United States Fleet Activities Sasebo, Sasebo, Nagasaki
• United States Fleet Activities Yokosuka, Yokosuka, Kanagawa
• Urago Ammunition Depot, Yokosuka, Kanagawa Prefecture
• Tsurumi POL Depot, Yokohama, Kanagawa Prefecture
• Naval Housing Annex Negishi, Yokohama, Kanagawa Prefecture
• Naval Transmitter Station Totsuka, Yokohama, Kanagawa Prefecture
• Naval Support Facility Kamiseya, Yokohama, Kanagawa Prefecture
• Tomioka Storage Area, Yokohama, Kanagawa Prefecture
• Naval Housing Annex Ikego, Zushi, Kanagawa
• White Beach Area, Okinawa Prefecture
• Awase Communication Station, Okinawa Prefecture
• Sobe Communication Site, Okinawa Prefecture
• New Sanno Hotel, Tokyo

View U.S. Military Bases in Japan in a larger map

Unlike most other countries that host U.S. military bases, Japan shoulders most of the cost of maintaining them: more than $4 billion per year in direct or indirect support. U.S. troops in Japan are hardly something new. Some 50,000 of them are spread among 73 bases on the main islands and Okinawa, and the Japanese shell out $2.6 billion yearly to keep them there.

Maintaining 50,000 U.S. troops in Japan requires millions of dollars each year to rotate GIs for three-year tours, which includes shipping their children, pets, and household goods. In addition, mainland Japan is an unpopular duty station because of cold weather, high costs, and polite yet unfriendly locals. Since housing costs for military families and American civilian employees are twice that of the USA, the U.S. military also spends millions of dollars for additional housing costs and “locality” pays.