When plan for the round Shikoku island, Dogo Onsen already in the list, mainly due to the public bath house. I mean the old one, that name one of the top 3 oldest onsen. Being go inside alone while wife no want to go, walk from the onsen hotel we stay, and few minutes walk,
I had one scene saw while at Japan (few years back), from Osaka to Koyasan, people dress in pilgrimage dress in old fashion, take the same train like us, and then cable car, and bus to visit temples in Koyasan. See the photo I snap at that time. Actually I saw more people in this