Onsen, According to Japanese Onsen People: Where They Soak, How They Book, and What They Skip
Most onsen guides are written by visitors who went once. This one is aggregated from the people who go monthly: Japanese comment sections where regulars name the baths they actually use, correct the listicles, flag what's closed, and hand over their booking tricks — every number below is a real like-count from a translated Japanese comment.
