Shikoku, literally speaking 4 countries, is the smallest of the 4 largest islands of Japan. It is located between the islands of Kyūshū and Honshū, the main island. It is divided into four prefectures: Tokushima (formerly Awa), Kagawa (formerly Sanuki), Ehime (formerly Iyo) and Kōchi (formerly Tosa).
The climate is similar to that of Honshū.
The island is particularly famous for its pilgrimage of 88 temples. In each temple, you can have a calligraphy done on a notebook, sold in the first temple and in the temples which number ends with 8.
A museum in memory of Sakamoto Ryōma (1836-1867) is located in Katsurahama, Kōchi Prefecture. This supporter of Bakumatsu (last days of the Tokugawa shogunate), defender of national unity but revolutionary from the point of view of the regime, was assassinated. This hero was from Tosa.
In Tokushima, you can see the famous naruto. This natural phenomenon is visible twice a day. North and south of Naruto Straits, fast ocean currents of up to 18 km/h appear thanks to ebb and flow. Because the straits are cramped and the seabed is hollow, vortexes called naruto appear. You can admire them from the Uzu-no-michi bridge or from a boat. Don't miss the beautiful Iya Valley and the Kazurabashi Liana Bridge that spans it. For those fond of unexplained phenomena, the southern entrance to the Ōboke Gorge, close to Iya, would be populated by yōkai, supernatural beings capable for some of them to turn into a new shape.
In Kagawa, don't miss the pretty Ritsurin-kōen park, comprising 6 ponds and 13 hills, created by a feudal lord more than 400 years ago. The Shikoku-mura open-air museum features typical Shikoku buildings in the Edo and Meiji periods, as well as a reproduction of the famous Kazurabashi Bridge in the Iya Valley. You can see a "sanukite" volcanic rock, which produces a crystalline sound and which Tsutomu Yamashita uses to play lithophone. Kagawa's culinary specialty is Sanuki-udon. The Kotohira-gū or Konpira-gū shrine, dedicated to the god of the sea, is for the most athletic. There are 785 steps to reach the shrine and 1368 to reach the summit. The nearby village of Konpira offers a wide choice of onsen and ryōkan to relax.
On Shodo-shima Island, accessible by ferry from Kagawa, you can admire olive groves, the Kankakei Gorge and the sunset over the Inner Sea. The Kankakei Gorge is considered one of the three most beautiful valleys in Japan. The cliffs, more than 100 meters high, blaze in autumn. They are accessible by cable car.