The Shikoku Island League Plus is an independent professional baseball league in Japan, established in 2005. It features teams primarily from the four prefectures of Shikoku Island: Kagawa, Ehime, Kochi, and Tokushima. The league aims to promote baseball in the region and provide opportunities for players to showcase their talents. The league consists of several teams, including the Kagawa Olive Guyners and the Ehime Mandrakes. Unlike the more prominent Nippon Professional Baseball (NPB), the Shikoku Island League Plus operates independently, allowing for a unique baseball experience that emphasizes local culture and community engagement.