Shikoku Island League Plus
| Sport | Baseball |
|---|---|
| Founded | 2005 |
| No. of teams | 4 |
| Country | Japan |
| Most recent champion(s) | Ehime Mandarin Pirates |
| Most titles | Kagawa Olive Guyners Tokushima Indigo Socks (7) |
The Shikoku Island League Plus (四国アイランドリーグplus, Shikoku Airando Rīgu purasu) is an independent professional baseball league on the island of Shikoku in Japan. (None of the teams in Nippon Professional Baseball are based in Shikoku.) The league currently has four teams, and has its league headquarters in Takamatsu.
The Shikoku Island League has two principal sponsors, the Shikoku Railway Company (JR Shikoku) and the Shikoku Coca-Cola Bottling Company. Other sponsors include Taiyo Oil Company, Shikoku Meiji Dairies, Japan Airlines, sporting goods maker Mizuno Corp., Internet service provider Biglobe, convenience store chain FamilyMart, and Nihon McDonald's.
The Shikoku Island League Plus is part of the Japan Independent Baseball League Organization (which also includes the Baseball Challenge League).