Besides JR Shikoku lines, this tourist pass covers most of Shikoku's railway, offering you an all-you-can-ride option on Iyo Railway, Tosaden Kotsu, Tosa Kuroshio Railway, Asato Kaigan Railway, and Kotoden. Visitors coming to Japan for short-term stays can buy and use the pass for 3, 4, 5, or 7 days. You can buy the pass both at oversea-offices or directly at the JR Shikoku Travel Center counter.

https://shikoku-railwaytrip.com/railpass.html