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

It is a transportation pass that allows unlimited rides on trains, buses, and trams within the specified area of Kochi Prefecture.
You can purchase it at Kochi Ryoma Airport, Kochi Station, Nakamura Station, Aki Station, or online. There are two kinds of passes for the West and East area, and both can be used for three consecutive days.

https://visitkochijapan.com/en/usefuls/kochi3day