is the smallest ( long and between wide) and least populous (4,141,955 as of 2005) of the four main islands of Japan, located south of Honshu and east of the island of Kyushu. Its ancient names include Iyo-no-futana-shima , Iyo-shima , and Futana-shima . The current name refers to the four former provinces that made up the island: Awa, Tosa, Sanuki, and Iyo.