The Inland Sea and its major straits with the bay of Osaka (dashed)
Formally named the Seto Inland Sea (瀬戸内海 Seto Naikai), the Inland Sea is the body of water separating Honshu, Shikoku and Kyushu, three of the main islands of Japan. Before the construction of the Sanyo Main Line, it was the main transportation link between the Kansai region and Kyushu.
The Inland Sea region is known for its moderate climate, with a stable year-round temperature and relatively low rainfall levels: the area is often called "the land of fair weather" (晴れの国 hare no kuni). The sea is also famous for its periodic red tides (赤潮 akashio) caused by dense occurrences of certain phytoplankton and resulting in the killing of large numbers of fish that float to the surface.
External link
Seto Inland Sea (http://www.tourism-seto.jp/set0010.html) official website
Formally named the SetoInlandSea (瀬戸内海 Seto Naikai), the InlandSea is the body of water separating Honshu, Shikoku, and Kyushu, three of the main islands of Japan.
The sea is also famous for its periodic red tides (赤潮; akashio) caused by dense occurrences of certain phytoplankton and resulting in the death of large numbers of fish.
In the Edo period, the InlandSea was one of the busiest transport lines in Japan.