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United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...
base in
Yokosuka is a city in Kanagawa Prefecture, Japan. , the city has a population of 373,797, and a population density of . The total area is . Yokosuka is the 11th-most populous city in the Greater Tokyo Area, and the 12th in the Kantō region. The city i ...
,
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
. Its mission is to maintain and operate base facilities for the logistic, recreational, administrative support and service of the U.S. Naval Forces Japan,
Seventh Fleet The Seventh Fleet is a numbered fleet of the United States Navy. It is headquartered at U.S. Fleet Activities Yokosuka, in Yokosuka, Kanagawa Prefecture, Japan. It is part of the United States Pacific Fleet. At present, it is the largest of th ...
and other operating forces assigned in the Western Pacific. CFAY is the largest strategically important U.S. naval installation in the western Pacific. Fleet Activities Yokosuka comprises 2.3 km2 (568 acres) and is located at the entrance of
Tokyo Bay is a bay located in the southern Kantō region of Japan spanning the coasts of Tokyo, Kanagawa Prefecture, and Chiba Prefecture, on the southern coast of the island of Honshu. Tokyo Bay is connected to the Pacific Ocean by the Uraga Channel. Th ...
, 65 km (40 mi) south of Tokyo and approximately 30 km (20 mi) south of
Yokohama is the List of cities in Japan, second-largest city in Japan by population as well as by area, and the country's most populous Municipalities of Japan, municipality. It is the capital and most populous city in Kanagawa Prefecture, with a popu ...
on the
Miura Peninsula is a peninsula located in Kanagawa, Japan. It lies south of Yokohama and Tokyo and divides Tokyo Bay, to the east, from Sagami Bay, to the west. Cities and towns on the Miura Peninsula include Yokosuka, Miura, Hayama, Zushi, and Kamak ...
in the
Kantō region The is a geography, geographical region of Honshu, the largest island of Japan. In a common definition, the region includes the Greater Tokyo Area and encompasses seven prefectures of Japan, prefectures: Chiba Prefecture, Chiba, Gunma Prefe ...
of the Pacific Coast in Central
Honshu , historically known as , is the largest of the four main islands of Japan. It lies between the Pacific Ocean (east) and the Sea of Japan (west). It is the list of islands by area, seventh-largest island in the world, and the list of islands by ...
, Japan. The 55 tenant commands which make up this installation support U.S. Navy Pacific operating forces, including principal afloat elements of the United States Seventh Fleet, including the only permanently forward-deployed
aircraft carrier An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and hangar facilities for supporting, arming, deploying and recovering carrier-based aircraft, shipborne aircraft. Typically it is the ...
, , the group she heads,
Carrier Strike Group Five Carrier Strike Group 5, also known as CSG 5 or CARSTRKGRU 5, is the U.S. Navy carrier strike group assigned to the United States Pacific Fleet and permanently forward-deployed to the U.S. 7th Fleet. The Strike Group Flagship is the which als ...
, and
Destroyer Squadron 15 Destroyer Squadron 15 is the largest destroyer squadron in the United States Navy consisting of ten ''Arleigh Burke''-class destroyers forward deployed to Yokosuka, Japan. Commander, Destroyer Squadron 15 also serves as Commander, Task Force 7 ...
.


History

When Commodore
Matthew Perry Matthew Langford Perry (August 19, 1969 – October 28, 2023) was an American and Canadian actor, comedian, director and screenwriter. He gained international fame for starring as Chandler Bing on the NBC television sitcom ''Friends'' (1994– ...
arrived in Japan in 1853, using naval pressure to open up Japan to foreign trade, Yokosuka was a quaint, native fishing village. In 1860, Lord
Oguri Kozukenosuke Oguri Kozukenosuke (Oguri Tadamasa, 16 July 1827 – 27 May 1868) was a statesman of the Tokugawa government in the last stage of the Edo period, and he is often regarded as a rival of Katsu Kaishu. At the time when the power of the Tokugawa g ...
, Minister of Finance to the
Tokugawa Shogunate The Tokugawa shogunate, also known as the was the military government of Japan during the Edo period from 1603 to 1868. The Tokugawa shogunate was established by Tokugawa Ieyasu after victory at the Battle of Sekigahara, ending the civil wars ...
Government, decided that "If Japan is to assume an active role in world trade, she must have proper facilities to build and maintain large seagoing vessels." He called upon the French Consul General,
Léon Roches Léon Roches (27 September 1809 – 1901) was a French diplomat. He was a representative of the French government in Japan from 1864 to 1868. Early life and education Léon Roches was born on 27 September 1809 in Grenoble. He was a student at the ...
, and asked for the assistance of the French government to build a shipyard and various basing facilities capable of handling large ships. French engineer
Léonce Verny François Léonce Verny, (2 December 1837 – 2 May 1908) was a French officer and naval engineerSims, Richard. (1998) ''French Policy Towards the Bakufu and Meiji Japan 1854-95: A Case of Misjudgement and Missed Opportunities,'' p. 246./ref> ...
was sent to Japan to accomplish the task. After the inspection of several sites, it was discovered that Yokosuka topographically, if on a smaller scale, resembled the port of
Toulon Toulon (, , ; , , ) is a city in the Provence-Alpes-Côte d'Azur region of southeastern France. Located on the French Riviera and the historical Provence, it is the prefecture of the Var (department), Var department. The Commune of Toulon h ...
, France. It was decided to establish the
shipyard A shipyard, also called a dockyard or boatyard, is a place where ships are shipbuilding, built and repaired. These can be yachts, military vessels, cruise liners or other cargo or passenger ships. Compared to shipyards, which are sometimes m ...
here. It would be called the "Yokosuka Iron Works". In 1871, the name was changed to the "Yokosuka Navy Yard". It was French engineer
Louis-Émile Bertin Louis-Émile Bertin (; 23 March 1840 – 22 October 1924) was a French naval engineer, one of the foremost of his time, and a proponent of the "Jeune École" philosophy of using light, but powerfully armed warships instead of large battleships. ...
who reorganized "Yokosuka Navy Yard" completely from 1886. Yokosuka was to become one of the main arsenals of the
Imperial Japanese Navy The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, Potsdam Declaration, when it was dissolved followin ...
into the 20th century. Battleships such as ''Yamashiro'', and
aircraft carrier An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and hangar facilities for supporting, arming, deploying and recovering carrier-based aircraft, shipborne aircraft. Typically it is the ...
s such as ''Hiryu'' and ''Shokaku'' were built there. Major naval aircraft were also designed at the
Yokosuka Naval Air Technical Arsenal had many names, each depending on the period of its existence, and the circumstances at that time. Many of the names were acronyms that were derived from its military name or designation, which changed from time to time. The arsenal was sometim ...
. In addition, numerous other facilities, including the headquarters of various naval units, administration buildings, military training schools, airfields, communication facilities, barracks, armories and a military hospital were established nearby in the course of its history, turning the area around the arsenal into a major fleet base. During
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, activities at the Yokosuka Navy Yard reached their peak. By 1944, it covered and employed over 40,000 workers. In addition to the shipbuilding plant, the yard also had a gun factory, ordnance and supply depots, a fuel storage facility, a
seaplane A seaplane is a powered fixed-wing aircraft capable of takeoff, taking off and water landing, landing (alighting) on water.Gunston, "The Cambridge Aerospace Dictionary", 2009. Seaplanes are usually divided into two categories based on their tech ...
base, and a naval air station.


U.S. Navy base

On 30 August 1945, Vice Admiral
Michitaro Totsuka was a vice admiral in the Imperial Japanese Navy in World War II. Biography Tozuka was a native of the former Shibuya, Tokyo, Sendagaya Village in Tokyo, now part of Shibuya, Tokyo, Shibuya. He graduated 33rd out of 149 cadets in the 38th class o ...
, last Japanese commander of the Yokosuka Naval District, surrendered his command to Rear Admiral
Robert Carney Robert Bostwick Carney (March 26, 1895 – June 25, 1990) was an admiral in the United States Navy who served as commander-in-chief of the NATO forces in Southern Europe (1951–1953) and then as Chief of Naval Operations (1953–1954) duri ...
, and the base was peacefully occupied by
U.S. Marines The United States Marine Corps (USMC), also referred to as the United States Marines or simply the Marines, is the maritime land force service branch of the United States Department of Defense. It is responsible for conducting expeditionary ...
of the
6th Marine Division The 6th Marine Division was a United States Marine Corps World War II infantry division formed in September 1944. During the invasion of Okinawa it saw combat at Yae-Take and Sugar Loaf Hill and was awarded a Presidential Unit Citation. Th ...
, British
Royal Marines The Royal Marines provide the United Kingdom's amphibious warfare, amphibious special operations capable commando force, one of the :Fighting Arms of the Royal Navy, five fighting arms of the Royal Navy, a Company (military unit), company str ...
, and U.S. Naval personnel. Commander Fleet Activities (COMFLEACT) Yokosuka was created shortly after the occupation in 1945. As the Base became organized, the shipyard was deactivated and much of the equipment was sent to other countries as part of reparations. The repair ship took charge of ship repair and maintenance, the hospital became a Naval
Dispensary A dispensary is an office in a school, hospital, industrial plant, or other organization that dispenses medications, medical supplies, and in some cases even medical and dental treatment. In a traditional dispensary set-up, a pharmacist dispense ...
, later
Naval Hospital Yokosuka Japan United States Naval Hospital Yokosuka Japan with its eight branch clinics are US Navy medical treatment facilities catering to the medical needs of eligible Sailors, Marines, Soldiers, Airmen, family members, U.S. government employees, retired mili ...
, and the Supply Department was organized to provide support to the fleet and shore-based activities. The Public Works Department was established. Yokosuka Submarine Base was founded in September 1945. In May 1946, the Marines at Yokosuka were redesignated Marine Barracks, U.S. Fleet Activities, Yokosuka. In April 1947, the Ship Repair Department was organized, and the shops and dry docks were reactivated to maintain the ships of the U.S. Fleet in the Pacific. With the onset of the
Korean War The Korean War (25 June 1950 – 27 July 1953) was an armed conflict on the Korean Peninsula fought between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK) and their allies. North Korea was s ...
on 25 June 1950, Yokosuka Navy Base suddenly became very important and extremely busy. The U.S., still an occupying power in Japan, turned its full efforts to the support of
South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia. It constitutes the southern half of the Korea, Korean Peninsula and borders North Korea along the Korean Demilitarized Zone, with the Yellow Sea to the west and t ...
. The Navy Dispensary was enlarged and expanded and was commissioned a U.S. Naval Hospital in 1950. The Naval Communications Facility, Yokosuka, was commissioned in January 1951. In April 1951, the Ship Repair Department became a component command. It was redesignated the Ship Repair Facility. As the major naval ship repair facility in the Far East, the Yokosuka Facility assumed a vital role in maintenance and repair of the U.S. Seventh Fleet during both the
Korean War The Korean War (25 June 1950 – 27 July 1953) was an armed conflict on the Korean Peninsula fought between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK) and their allies. North Korea was s ...
and
Vietnam War The Vietnam War (1 November 1955 – 30 April 1975) was an armed conflict in Vietnam, Laos, and Cambodia fought between North Vietnam (Democratic Republic of Vietnam) and South Vietnam (Republic of Vietnam) and their allies. North Vietnam w ...
. In March 1952, the geographical boundaries of
Naval Forces Far East The U.S. Naval Forces Japan/Navy Region Japan (CNFJ/CNRJ) is a dual-hatted command with command and control authority of all shore installations and assigned forces of the United States Navy in Japan as well as the responsibility to liaise with th ...
were changed to exclude the Philippines,
Marianas The Mariana Islands ( ; ), also simply the Marianas, are a crescent-shaped archipelago comprising the summits of fifteen longitudinally oriented, mostly Volcano#Dormant and reactivated, dormant volcanic mountains in the northwestern Pacific Ocean ...
,
Bonin The Bonin Islands, also known as the , is a Japanese archipelago of over 30 subtropical and tropical islands located around SSE of Tokyo and northwest of Guam. The group as a whole has a total area of but only two of the islands are permanent ...
and
Volcano Islands The or are a group of three Japanese-governed islands in Micronesia. They lie south of the Ogasawara Islands and belong to the municipality of Ogasawara, Tokyo, Tokyo Metropolis, Japan. The islands are all active volcanoes lying ato ...
. In December 1952, the headquarters were shifted from Tokyo to Yokosuka. The expanded Supply Department of Fleet Activities became Naval Supply Depot, Yokosuka in August 1952. In 1960, the Naval Communications Facility was redesignated U.S. Naval Communications Station, Japan. In 1952, US occupation of Japan formally ended and Japanese rearmament commenced, with its naval forces formally organized as
Japan Maritime Self Defense Force The , abbreviated , also simply known as the Japanese Navy, is the maritime warfare branch of the Japan Self-Defense Forces, tasked with the naval defense of Japan. The JMSDF was formed following the dissolution of the Imperial Japanese Navy ( ...
by 1954. Some parts of the former Yokosuka Naval District were ceded back to house a new base for JMSDF, now known as
JMSDF Yokosuka Naval Base The , abbreviated , also simply known as the Japanese Navy, is the navy, maritime warfare branch of the Japan Self-Defense Forces, tasked with the naval defense of Japan. The JMSDF was formed following the dissolution of the Imperial Japanese N ...
. On 5 October 1973, , with
Carrier Air Wing Five Carrier Air Wing Five (CVW-5) is a United States Navy aircraft carrier air wing based at Marine Corps Air Station Iwakuni. The air wing is attached to the aircraft carrier . It was initially formed in 1943. It has participated in the Second World ...
and her accompanying task group, put into Yokosuka, marking the first forward deployment of a complete carrier task group in a Japanese port. This was the result of an accord reached on 31 August 1972 between the U.S. and Japan. In addition to the morale factor of dependents housed along with the crew in a foreign port, the move had strategic significance because it facilitated the continuous positioning of three carriers in the Far East at a time when the economic situation demanded the reduction of carriers in the fleet. In August 1991, ''Midway'' departed Yokosuka and was replaced by as the forward-deployed carrier in Yokosuka. In August 1998, relieved ''Independence'' as the 7th Fleet forward-based carrier. On 1 December 2005, the U.S. Navy announced that in 2008 ''Kitty Hawk'' would be replaced by the
nuclear-powered Nuclear power is the use of nuclear reactions to produce electricity. Nuclear power can be obtained from nuclear fission, nuclear decay and nuclear fusion reactions. Presently, the vast majority of electricity from nuclear power is produced b ...
. A U.S. Navy spokesman said the decision was a mutual agreement between the United States and Japan. Hiroyuki Hosoda, spokesman for Japan's government, said, "We believe that the change (of the carriers) will lead to maintaining the solid presence of the U.S. Navy and contribute to keeping Japan's security and international peace into the future." On 25 September 2008, ''George Washington'' arrived in Yokosuka, making it the only forward-deployed, nuclear-powered aircraft carrier in the U.S. Navy. In recent years, a number of high-profile international incidents involving U.S. sailors occurred around the base. The most notable were two murders which occurred in 2006 and 2008. One of them was the murder was committed by Seaman Olantunbosun Ugbogu, a Nigerian citizen who had joined the U.S. Navy, but had not yet received citizenship. Ugbogu stabbed a taxi driver to death in order to avoid paying a $200 fare, which he had incurred returning from Tokyo. He had been stationed aboard the
guided missile cruiser A cruiser is a type of warship. Modern cruisers are generally the largest ships in a fleet after aircraft carriers and amphibious assault ships, and can usually perform several operational roles from search-and-destroy to ocean escort to s ...
, but was
absent without leave Desertion is the abandonment of a military duty or Military base, post without permission (a Pass (military), pass, Shore leave, liberty or Leave (U.S. military), leave) and is done with the intention of not returning. This contrasts with u ...
at the time of the murder and considered a deserter. Both murders resulted in the U.S. Navy severely restricting the liberty of all sailors in the fleet. Personnel and ships from the base assisted with
Operation Tomodachi was a United States Armed Forces (especially United States Forces Japan, U.S. Forces Japan) assistance operation to support Japan in Emergency management, disaster relief following the 2011 Tōhoku earthquake and tsunami. The operation took pl ...
following and during the March
2011 Tōhoku earthquake and tsunami On 11 March 2011, at 14:46:24 Japan Standard Time, JST (05:46:24 UTC), a  9.0–9.1 Submarine earthquake, undersea megathrust earthquake occurred in the Pacific Ocean, east of the Oshika Peninsula of the Tōhoku region. It lasted approx ...
and
Fukushima I nuclear accidents The Fukushima nuclear accident was a major nuclear accident at the Fukushima Daiichi Nuclear Power Plant in Ōkuma, Fukushima, Japan, which began on 11 March 2011. The cause of the accident was the 2011 Tōhoku earthquake and tsunami, which ...
. During the crisis, around 3,000 U.S. family members left the base, preferring to be outside Japan during a time of uncertainty.


Forward-deployed ships


Command ship

* – flagship,
United States Seventh Fleet The Seventh Fleet is a numbered fleet of the United States Navy. It is headquartered at U.S. Fleet Activities Yokosuka, in Yokosuka, Kanagawa Prefecture, Japan. It is part of the United States Pacific Fleet. At present, it is the largest of the ...
. 979 - Present


Aircraft carrier

* – flagship,
Carrier Strike Group Five Carrier Strike Group 5, also known as CSG 5 or CARSTRKGRU 5, is the U.S. Navy carrier strike group assigned to the United States Pacific Fleet and permanently forward-deployed to the U.S. 7th Fleet. The Strike Group Flagship is the which als ...
.


Cruisers

*


Destroyers

Destroyer Squadron 15 Destroyer Squadron 15 is the largest destroyer squadron in the United States Navy consisting of ten ''Arleigh Burke''-class destroyers forward deployed to Yokosuka, Japan. Commander, Destroyer Squadron 15 also serves as Commander, Task Force 7 ...
(COMDESRON 15) * * * * * * USS ''Shoup'' (DDG-86) * * * * *


Ships formerly forward-deployed

* 1958 – December 1968 * 1998 - 2006 * 1999 -2007 * 1990 - 2003 * 2000 - 2013 * 2008 – 2015 * 1998 - 2008 * 1991 - 1998 * 1997 – 2005 * 1990-1997 * 1990 – 1996 * August 1992 – 2004 * March 1998 – 2005 * 1988 - 1998 * August 1977 – July 1988 * May 1975 – July 1988 * 1973 – 1991 * March 1988–? 1995 * 1980 - 1991 * August 1988 – July 1998 * October 1980 – October 1990 * 1983 – October 1990 * * * 1968 – August 1970 * 1968 – August 1970 * * * * * * 1984 - 1995 * * * * * 1954–1968 * 1988 - 1997 * * 2005 - 2016 * 2004 - 2019 * 1996 - 2021 * 2007 - 2020 * * 2005 - 2019 * * * * * 1997 – 2021 * 2006 - 2021 * 2016 - 2023


Landmarks

During the late 1960s and 1970s, the Yokosuka Microwave Communications Site was part of the telephone communications network in the Tokyo area. The building and 106.7 meter tall microwave tower was on the highest hill on the U.S. Navy base. Komatsu, a historic restaurant near the naval base, became famous for serving Japanese navy personnel before 1945 and the U.S. Navy after. It was destroyed by fire in 2016.


Education

Department of Defense Education Activity The Department of Defense Education Activity (DoDEA) is a federal school system headquartered in Alexandria, Virginia, responsible for planning, directing, coordinating, and managing prekindergarten through 12th grade educational programs on beh ...
(DoDEA) schools include: *
Nile C. Kinnick High School Nile C. Kinnick High School is a U.S. military-operated school that originally opened in Yokohama, Japan in 1946 during the occupation after World War II. The school later moved to United States Fleet Activities Yokosuka, US Fleet Activities Yok ...
* Yokosuka Middle School * Sullivans Elementary School Ikego Elementary School is located in the Ikego Housing Area.


See also

*
United States Fleet Activities Sasebo U.S. Fleet Activities Sasebo is a United States Navy base, in Sasebo, Japan, on the island of Kyūshū. It provides facilities for the logistic support of forward-deployed units and visiting operating forces of the United States Pacific Fleet a ...


References


External links


Navy Lodge Yokosuka
* * {{Coord, 35.2932, 139.671293, display=t
Fleet Activities Yokosuka or is a United States Navy base in Yokosuka, Japan. Its mission is to maintain and operate base facilities for the logistic, recreational, administrative support and service of the U.S. Naval Forces Japan, Seventh Fleet and other operating f ...
Yokosuka Buildings and structures in Yokosuka, Kanagawa Japan Maritime Self-Defense Force bases 1870 establishments in Japan