Shikoku (四国, Shikoku "four provinces") is the smallest (225 km long and between 50 and 150 km wide) and least populous (4,141,955 as of 2005) of the four main islands of Japan, located south of Honshū and east of Kyūshū island. Its ancient names include Iyo-no-futana-shima (伊予之二名島), Iyo-shima (伊予島), and Futana-shima (二名島). The current name refers to the four former provinces which made up the island: Awa, Tosa, Sanuki, and Iyo.