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Shikoku (四国, literally "four provinces") is one of the five main islands of Japan. Shikoku is the second-smallest main island after Okinawa. It is 225 km or 139.8 mi long and between 50 and 150 km or 31.1 and 93.2 mi wide. It has a population of 3.8 million (as of 2015, 3.1%). It is south of Honshu and northeast of Kyushu.[3] Shikoku's ancient names include Iyo-no-futana-shima (伊予之二名島), Iyo-shima (伊予島), and Futana-shima (二名島), and its current name refers to the four former provinces that made up the island: AwaTosaSanuki, and Iyo.

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