Islands of Tokushima Prefecture

is the smallest of the four main islands of Japan. It is long and between wide. It has a population of 3.8 million, the least populated of Japan's four main islands. It is south of Honshu and northeast of Kyushu. Shikoku's ancient names include , , and , and its current name refers to the four former provinces that make up the island: Awa, Tosa, Sanuki, and Iyo.

is an island in the Seto Inland Sea administered under Naruto in Tokushima Prefecture.