Ibusuki Sand Bath Hall Saraku

On the shore at Ibusuki, near the southern tip of the Satsuma Peninsula, hot spring water heats the beach sand, and Saraku turns that into a bath. You check in, change into a cotton yukata, walk down to the sand area and lie back while an attendant shovels warm, damp sand over you until only your head shows. Most people stay buried for about 10 to 15 minutes, and you can ask for more sand on any spot you want extra warmth.

Afterward you shake off and rinse in the indoor baths, which are separated by gender, while the sand area itself is shared by everyone in yukata. The basic set with the sand bath, large bath and yukata costs 1,500 yen for adults; towel sets cost 1,800 or 2,100 yen, and a set with rented underwear is 2,600. Ibusuki's coastal baths are fed by sodium-chloride water.

Saraku is about 20 minutes on foot from JR Ibusuki Station, open from 8:30 a.m. with last entry at 8 p.m., and on weekdays the sand reception pauses from noon to 1 p.m. Put your phone in a plastic bag and eat after rather than before. The downsides: reception can close early when the queue is long, the beach pit is at the mercy of weather, and it shuts for about a week every July and December.