The Shikoku region, comprising Shikoku and its surrounding islets, covers about 18,800 square kilometres (7,259 sq mi) and consists of four prefectures: Ehime, Kagawa, Kochi, and Tokushima. Across the Inland Sea lie Wakayama, Osaka, Hyōgo, Okayama, Hiroshima, and Yamaguchi Prefectures on Honshū. To the west lie Ōita and Miyazaki Prefectures on Kyūshū.

The 50th largest island by area, Shikoku is smaller than Sardinia and Bananal, but larger than Halmahera and Seram. By population, it ranks 23rd, having fewer inhabitants than Sicily or Singapore, but more than Puerto Rico or Negros.

Within the island, a web of national highways connects the major population centers.

 

Shikoku is also famous for its 88-temple pilgrimage of temples associated with the priest Kūkai. Most modern day pilgrims travel by bus, rarely choosing the old-fashioned method of going by foot. They are seen wearing white jackets emblazoned with the characters reading dōgyō ninin meaning "two traveling together".

Tokushima Prefecture also has its annual Awa Odori running in August at the time of the Obon festival, which attracts thousands of tourists each year from all over Japan and from abroad.