Shōdo Island (小豆島 Shōdoshima?) is an island located in the Inland Sea of Japan. The name means literally "Island of Small Beans". There are two towns on the island: Tonoshō and Shōdoshima, comprising the district of Shōzu.
The island is famous as the setting for the novel Twenty-Four Eyes, and its subsequent film adaptations. The island was the first area of Japan to successfully grow olives, and is sometimes known as "Olive Island".
Shōdoshima is part of Kagawa Prefecture and is located north of the prefectural capital Takamatsu. It has an area of 153.30 km2 (59.19 sq mi) and a coastline of 126 km (78 mi). It is the 19th largest island in Japan, and the second largest in the Inland Sea.
Shōdoshima is home to Dobuchi Strait (土渕海峡 Dobuchi-kaikyō?) the world's narrowest strait, 9.93 m (32.58 ft) meters at its narrowest.
Frequent ferries run to the island from Takamatsu, Himeji, Teshima and Okayama. Ferries run infrequently to Osaka and Kōbe as well.