The Seto Inland Sea is a beautiful waterway separating Japan’s main islands of Honshu, Shikoku, and Kyushu, connecting the Pacific Ocean and the Sea of Japan. Known for its moderate climate and scenic islands – nearly 3,000 in total, including Awaji and Shōdoshima – it’s a historically significant transport route and now a popular tourist destination. Highlights include the Itsukushima Shrine (a UNESCO World Heritage Site), the Naruto whirlpools, and the Setouchi Triennale art festival, with major cities like Hiroshima and Osaka along its coast. Modern bridges now connect the islands, while the sea remains important for both cargo transport and local travel.Wikipedia