While yes it is true that Shikoku is rich with culture, and art, and pilgrimage experiences, and unbelievable food, there is also much to do in terms of adventure tourism as well. This is a great little article in the Asahi Shimbun about cave exploration. Shikoku is also home to some of the most abundant, pristine, and untouched nature you can imagine. And while it might seem like a good idea to stand in a long line as you shuffle up to the top of Mt. Fuji staring at the back of someone else’s backpack, how about coming to a great Japanese natural environment where you can explore and almost no one else is around.
https://mainichi.jp/english/articles/20210429/p2a/00m/0na/028000c