Kagawa Prefecture in the context of Shōdoshima

The Seto Inland Sea (瀬戸内海, Seto Naikai), sometimes shortened to the Inland Sea, is the body of water separating Honshu, Shikoku, and Kyushu, three of the four main islands of Japan. It serves as a waterway connecting the Pacific Ocean to the Sea of Japan. It connects to Osaka Bay and provides a sea transport link to industrial centers in the Kansai region, including Osaka and Kobe. Before the construction of the San'yō Main Line, it was the main transportation link between Kansai and Kyūshū.

Yamaguchi, Hiroshima, Okayama, Hyōgo, Osaka, Wakayama, Kagawa, Ehime, Tokushima, Fukuoka, and Ōita prefectures have coastlines on the Seto Inland Sea; the cities of Hiroshima, Iwakuni, Takamatsu, and Matsuyama are also located on it.

Tokushima Prefecture (徳島県, Tokushima-ken; Japanese pronunciation: [to.kɯ̥ꜜ.ɕi.ma, tokɯ̥.ɕiꜜ.ma, to.kɯ̥.ɕi.maꜜ.keɴ]) is a prefecture of Japan located on the island of Shikoku. Tokushima Prefecture has a population of 682,439 (1 February 2025) and has a geographic area of 4,146 km (1,601 sq mi). Tokushima Prefecture borders Kagawa Prefecture to the north, Ehime Prefecture to the west, and Kōchi Prefecture to the southwest.

Tokushima is the capital and largest city of Tokushima Prefecture, with other major cities including Anan, Naruto, and Yoshinogawa. Tokushima Prefecture is located on the Kii Channel, connecting the Pacific Ocean and Seto Inland Sea, across from Wakayama Prefecture on the Kii Peninsula of the island of Honshu. Tokushima Prefecture is connected to Awaji Island across the Naruto Strait by the Ōnaruto Bridge as part of the Kobe-Awaji-Naruto Expressway, connecting the prefecture to the city of Kobe and the San'yō Expressway on Honshu.

Okayama Prefecture (岡山県, Okayama-ken; Japanese pronunciation: [o.kaꜜ.ja.ma, o.ka.ja.maꜜ.keɴ]) is a prefecture of Japan located in the Chūgoku region of Honshu. Okayama Prefecture has a population of 1,815165 (1 October 2025) and has a geographic area of 7,114 km (2,746 sq mi). Okayama Prefecture borders Tottori Prefecture to the north, Hyōgo Prefecture to the east, and Hiroshima Prefecture to the west.

Okayama is the capital and largest city of Okayama Prefecture, with other major cities including Kurashiki, Tsuyama, and Sōja. Okayama Prefecture's south is located on the Seto Inland Sea coast across from Kagawa Prefecture on the island of Shikoku, which are connected by the Great Seto Bridge, while the north is characterized by the Chūgoku Mountains.

Ehime Prefecture (愛媛県, Ehime-ken; Japanese pronunciation: [eꜜ.çi.me, e.çi.meꜜ.keɴ]) is a prefecture of Japan located on the island of Shikoku. Ehime Prefecture has a population of 1,334,841 and a geographic area of 5,676 km (2,191 sq mi). Ehime Prefecture borders Kagawa Prefecture to the northeast, Tokushima Prefecture to the east, and Kōchi Prefecture to the southeast. Ehime Prefecture Prefecture also borders Hiroshima Prefecture for 74 metres (243 ft) on Hyōtanjima.

Matsuyama is the capital and largest city of Ehime Prefecture and the largest city on Shikoku, with other major cities including Imabari, Niihama, and Saijō.

Takamatsu (高松市, Takamatsu-shi; Japanese: [takaꜜmatsɯ]) is a capital city located in Kagawa Prefecture, Japan. As of 1 November 2022, the city had an estimated population of 414,134 in 190,120 households and a population density of 1,100 persons per km. The total area of the city is 375.41 square kilometres (144.95 sq mi). It is the capital city of the prefecture.

Masayoshi Ōhira (大平 正芳, Ōhira Masayoshi; 12 March 1910 – 12 June 1980) was a Japanese politician who served as prime minister of Japan from 1978 until his death in 1980.

Born in Kagawa Prefecture, Ōhira worked in the Ministry of Finance from 1936, and served as the private secretary to Hayato Ikeda, finance minister from 1949 to 1952. Ōhira was first elected to the Diet in 1952, and served as foreign minister in Ikeda's cabinet from 1962 to 1964 and as international trade and industry minister from 1968 to 1970 under Eisaku Satō. He took over Ikeda's faction of the Liberal Democratic Party and later served as foreign minister from 1972 to 1974 under Kakuei Tanaka and as finance minister from 1974 to 1976 under Takeo Miki. He succeeded Takeo Fukuda as LDP president and prime minister in 1978. After his government was defeated in a no-confidence vote, Ōhira decided to call the 1980 election rather than resign, but died suddenly of a heart attack. He is the most recent Japanese premier to die in office.

The Great Seto Bridge or Seto Ohashi Bridge (瀬戸大橋, Seto Ōhashi) is a series of double deck bridges connecting Okayama and Kagawa prefectures in Japan across a series of five small islands in the Seto Inland Sea. Built over the period 1978–1988, it is one of the three routes of the Honshū–Shikoku Bridge Project connecting Honshū and Shikoku islands and the only one to carry rail traffic. The total length is 13.1 kilometers (8.1 mi), and the longest span, the Minami Bisan-Seto Bridge, is 1,100 m (3,600 ft).

Crossing the bridge takes about 20 minutes by car or train. The ferry crossing before the bridge was built took about an hour.

Sakaide (坂出市, Sakaide-shi) is a city located in Kagawa Prefecture, Japan. As of 1 October 2022, the city had an estimated population of 49,439 in 21,347 households and a population density of 530 persons per km. The total area of the city is 92.49 square kilometres (35.71 sq mi).

Tamura Jinja (田村神社) is a Shinto shrine in the Ichinomiya neighborhood of the city of Takamatsu in Kagawa Prefecture, Japan. It is the ichinomiya of former Sanuki Province. The main festivals of the shrine are held annually on May 8 and October 8. It is located approximately 7 km south of downtown Takamatsu. The area has abundant spring water, and the shrine is based on the worship of the god of water and the shrine's inner shrine is built over a spring. The name 'Tamura' is based on locale, and has no relationship with Sakanoue no Tamuramaro like other shrines of the same name in other parts of Japan.