Kozushima Hot Spring Winter Crab Tour: Eat 2 whole Matsuba crabs per person, stay in a century-old Japanese-style inn and visit other hot springs
If you want to include Onsen Street, yukata strolls, and a table of crab dishes in the same Kansai trip during the winter, the onsen ryokan Sasakura (Onsen Sakura) in Hyogo Koseki Onsen is definitely worth adding to your itinerary.