An open-air-only bath at the edge of the Pacific. One of Japan's oldest springs, mentioned in the 8th-century Nihon Shoki; on rough days sea spray reaches the tubs. No roof, no wash stations.
Shirahama's other classic public bath, on the Yuzaki seafront near Saki-no-yu. Its draw: two distinct springs — Mabuyu and Miyukiyu — under one roof. 7 am to 10 pm, ¥420.
A town-run bathhouse right in front of Shirara-hama, the famous white-sand beach. Built like an old-fashioned sentō with an attendant's counter, its second-floor bathroom opens through big windows onto the beach, blue sea and sky — a ¥420 view bath you would never expect in a resort. The 66.8°C sodium-chloride 'Suzushi-yu' source flows freely, and the strongly salty water keeps you warm long after. Open 09:00–11:00 and 14:00–21:30 (last entry 21:00; 07:00–09:00 is residents only), closed Thursdays. Soap and shampoo sold for ¥40; no hair dryers. One of Shirahama's 'sotoyu' circuit with Saki-no-yu and Muro-no-yu — locals rinse off the sand after a swim and come straight in. About 15 minutes by bus from Shirahama Station to 'Shirarahama'.