Japanese cruiser Kasuga

The attack on Yokosuka was an air raid conducted by the United States Navy on 18 July 1945 during the last weeks of the Pacific War. The Japanese battleship Nagato was the raid's main target, though anti-aircraft positions and other warships at Yokosuka Naval Arsenal were also attacked. Other U.S. Navy and Royal Navy aircraft struck airfields in the Tokyo area. While Nagato was only lightly damaged, the American aircraft sank a destroyer, a submarine and two escort vessels and damaged five small vessels. The Allied pilots also claimed the destruction of several locomotives and 43 Japanese aircraft as well as damage to another 77 aircraft. Japanese anti-aircraft guns shot down twelve American and two British aircraft.

United States Fleet Activities Yokosuka (横須賀海軍施設, Yokosuka kaigunshisetsu) or Commander Fleet Activities Yokosuka (司令官艦隊活動横須賀, Shirei-kan kantai katsudō Yokosuka) 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 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, 65 km (40 mi) south of Tokyo and approximately 30 km (20 mi) south of Yokohama on the Miura Peninsula in the Kantō region of the Pacific Coast in Central Honshu, 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, USS Ronald Reagan (CVN-76), the group she heads, Carrier Strike Group Five, and Destroyer Squadron 15.

Yokosuka Naval Arsenal (横須賀海軍工廠, Yokosuka kaigun kōshō) was one of four principal naval shipyards owned and operated by the Imperial Japanese Navy, and was located at Yokosuka, Kanagawa prefecture on Tokyo Bay, south of Yokohama.

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 US Fleet Activities Yokosuka, Japan in 1971, but kept the Yo-Hi Red Devils mascot to honor the schools beginnings. The school was named after Nile Clarke Kinnick, Jr. in 1990. Kinnick High School usually has around 600 students and is about 45 km from Tokyo.

USS Nueces (APB-40) is a Benewah-class barracks ship of the United States Navy. She was notable for her service in the Vietnam War.

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 military service members and other eligible beneficiaries of the Forward Deployed Naval Forces on mainland Japan, Korea and Diego Garcia. The core hospital is located on board Commander Fleet Activities Yokosuka with branch clinics serving Naval Air Facility Atsugi, Combined Arms Training Center Camp Fuji, Commander Fleet Activities Chinhae Korea, Naval Support Activity Diego Garcia, Marine Corps Air Station Iwakuni and Commander Fleet Activities Sasebo. U.S. Naval Hospital Yokosuka staff is composed of active duty service members, U.S. Civil Servants (USCS), contract employees and Japan Master Labor Contract (MLC) employees.

Kanagawa Dental University (神奈川歯科大学, Kanagawa Shika Daigaku) is a private university in Yokosuka, Kanagawa, Japan. The predecessor of the school was founded in 1910 in Kanda, Tokyo as the Tokyo Joshi Shika Gakiun Gakkō (東京女子歯科医学校). After the 1923 Great Kantō earthquake, it relocated to Shinagawa. It relocated again to Ota-ku, Tokyo in 1933, and to its present location in Yokosuka in 1964. It was chartered as a coeducational university in 1964.Kanagawa Dental University Junior College is a subsidiary of the Kanagawa Dental College, and shares the same campus.

SKanagawa Dental University Junior College (神奈川歯科大学短期大学部, Kanagawa shika daigaku tankidaigaku bu) is a private junior college in Yokosuka, Kanagawa Prefecture, Japan, established in 1952. The predecessor of the school was founded in 1910 in Kanda, Tokyo as the Tokyo Joshi Shika Gakiun Gakkō (東京女子歯科医学校), the first women's dental school in Japan. After the 1923 Great Kantō earthquake, it relocated to Shinagawa. It relocated again to Ota-ku, Tokyo in 1933, and to its present location in Yokosuka in 1964 as the Kanagawa Dental College. The junior college was established in 1952, and shares the same campus. The primary aspect of its curriculum is to provide the commercial, legal and communications skills for a successful dental practice.

Mikasa Park (三笠公園, Mikasa Kōen) is a park located in Yokosuka, Kanagawa, Japan.

Mikasa (三笠) is a pre-dreadnought battleship built for the Imperial Japanese Navy (IJN) in the late 1890s, and is the only ship of her class. Named after Mount Mikasa in Nara, Japan, the ship served as the flagship of Vice Admiral Tōgō Heihachirō throughout the Russo-Japanese War of 1904–1905, including the Battle of Port Arthur on the second day of the war and the Battles of the Yellow Sea and Tsushima. Days after the end of the war, Mikasa's magazine accidentally exploded and sank the ship. She was salvaged and her repairs took over two years to complete. Afterwards, the ship served as a coast-defence ship during World War I and supported Japanese forces during the Siberian Intervention in the Russian Civil War. After 1922, Mikasa was decommissioned in accordance with the Washington Naval Treaty and preserved as a museum ship at Yokosuka. She was badly neglected during the post-World War II Occupation of Japan and required extensive refurbishing in the late 1950s. She has been partially restored, and is now a museum ship located at Mikasa Park in Yokosuka. Mikasa is the last remaining example of a pre-dreadnought battleship anywhere in the world and also the last example of a British-built battleship still existing.

The Port of Yokosuka (横須賀港, Yokosuka-kō) lies to the south of the Port of Yokohama on Tokyo Bay. Under the Ports and Harbors Law of Japan it is classified as an Important Port. The city of Yokosuka administers the port. The Port of Yokosuka has 100 berths of length 4.5 m or more. It covers 13 areas from Oppama in the north to Kurihama and Nobi in the south. Kurihama is the place where Commodore Matthew Perry landed in 1853. Since then it has been developed for military, shipping, and ferry traffic. The U.S. Navy base and the Maritime Self-Defense force base lie within the Port of Yokosuka. Located near the Nissan Oppama plant, Yokosuka is a major port for the shipping of automobiles. The fishing fleet brings in tuna and other ocean products. Tokyo-Wan Ferry links Yokosuka with the Port of Kanaya in Futtsu, Chiba Prefecture. Other ferries go to Tokyo, Izu Ōshima and Ōita in Kyūshū.

The Yokosuka Naval Base (Japanese: 横須賀基地, Hepburn: Yokosuka Kichi), also simply known as the JMSDF Yokosuka Naval Base, is a group of ports and land facilities of the Japan Maritime Self-Defense Force (JMSDF), which are scattered in multiple districts of Yokosuka City, Kanagawa Prefecture, and where the Yokosuka District Force, etc. are located. It is not officially called a base, but it is used as a common name. The base sits alongside the United States Fleet Activities Yokosuka. It has a facility where people can train with Japan's technology to create water pressure in the deep sea (water depth 450 meters). Not only allied countries such as the United States, Thailand, and Vietnam, but also the navy of hypothetical enemy countries such as Russia are visiting.