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Seto inland sea

Seto Inland Sea
(Setouchi)
Seto Inland Sea.jpg
View of the Seto Inland Sea from Miyajima island
Inlandsea.jpg
The Inland Sea and its major straits
Location Pacific Ocean
Coordinates 34°10′N 133°20′E / 34.167°N 133.333°E / 34.167; 133.333Coordinates: 34°10′N 133°20′E / 34.167°N 133.333°E / 34.167; 133.333
Type Sea
Basin countries Japan
Surface area 23,203 km2 (9,000 sq mi)
Average depth 38 m (125 ft)

The Seto Inland Sea (瀬戸内海 Seto Naikai?), also known as Setouchi or often shortened to Inland Sea, is the body of water separating Honshū, Shikoku, and Kyūshū, three of the four main islands of Japan. The region that includes the Seto Inland Sea and the coastal areas of Honshū, Shikoku, and Kyūshū is known as the Setouchi Region. 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, Kagawa, Ehime, Fukuoka, and Ōita prefectures all have coastlines on the Seto Inland Sea; the cities of Hiroshima, Iwakuni, Takamatsu, and Matsuyama are also located on it.


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