Shōdoshima or Shōdo Island is an island located in the Inland Sea of Japan. The name means "Island of Small Beans". There are two towns on the island: Tonoshō and Shōdoshima, composing the district of Shōzu.

The Seto Inland Sea , 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.