Setouchi region
Region in Japan

The Setouchi region (瀬戸内地方, Setouchi chihō), or simply Setouchi, is a geographic region of Japan. Setouchi includes the Seto Inland Sea and the adjacent coastal areas of Honshū, Shikoku, and Kyūshū, three of the four main islands of Japan.
Yamaguchi, Hiroshima, Okayama, Hyōgo, Osaka, Kagawa, Ehime, Fukuoka, and Ōita prefectures all have coastlines in Setouchi; the cities of Hiroshima, Iwakuni, Takamatsu, and Matsuyama are also located within the region.
01History
Since the 1980s, the sea's northern and southern shores have been connected by the three routes of the Honshū-Shikoku Bridge Project, including the Great Seto Bridge, which serves both railroad and automobile traffic.
02Geography
The Setouchi region is known for its moderate climate, with a stable year-round temperature and relatively low rainfall levels. The sea is also famous for its periodic red tides (赤潮, akashio) caused by dense aggregations of certain phytoplankton that result in the deaths of large numbers of fish.
Sources and credits
This article is adapted from the Wikipedia article “Setouchi region”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- Seto Inland Sea satellite.jpg by Jacques Descloitres, MODIS Land Rapid Response Team, NASA/GSFC, Public domain
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