The Shikoku Island League Plus (四国アイランドリーグplus Shikoku Airando Rīgu purasu?) is a baseball league on the islands of Shikoku in Japan. Neither the Central nor the Pacific League has a team based in Shikoku. IBLJ Inc. operates the league. IBLJ (which chose its name as an abbreviation of "Independent Baseball League of Japan"), founded by commentator and former professional baseball player Hiromichi Ishige, initially held all the rights to the teams, leadership, and players, but in 2006 established separate corporations for the teams. The company has its headquarters in Takamatsu.