Shimoda Sō Hamabe No Yu

243. 下田荘 浜辺の湯, Shimoda Visited for higaeri at 600 (with stamp book) + 100 for a towel (listed hours 13:00–21:00). They stamp the 60 Onsen of Shizuoka 24/25 booklet. Cozy place themed around surfing or SUP — the announcements, decor, and magazines all reflect it. There's a private bath (didn't take it, but looks fun in photos). Indoor bath with clear water, temperature 42. Air is tolerable. If you're into surfing/SUP, this place could be interesting (I'm not into it, but it was still fun to look around while waiting for a taxi). Otherwise, probably a skip given the remote location and fairly simple bath.