Hyotan Onsen

The bus ride from Beppu Station into the Kannawa district takes about twenty-five minutes, and you spend most of it watching white steam columns rise from vents in the road and sidewalks, sometimes right between parked cars. By the time you step off at the Kannawa stop and walk three minutes east, the air has a faint sulfurous edge and the whole neighborhood feels like it is sitting on top of something alive. That is the feeling Hyotan Onsen runs on.

The facility opened in 1950 and earned its name from the distinctive gourd-shaped outdoor pools at its entrance, hyotan being the Japanese word for gourd. What makes this place genuinely unusual, even by Beppu's crowded standards, is the range of water on offer in a single visit. Seven different spring types flow through the complex, each with its own mineral character and temperature. The main baths carry a mildly alkaline sodium-chloride water at around forty-two to fifty-five degrees, clear and almost silky against the skin. The bamboo cooling system the owners built drops the source temperature from one hundred degrees to a usable range without diluting the water with tap, so what you are soaking in is pure Kannawa spring from start to finish.

The sand bath, taki-no-yu waterfall pool, and steam bath are all separate experiences within the same grounds, and it is common to spend two hours working through them in sequence. The sunamushi here uses sand from Beppu Beach only, heated by geothermal steam rather than direct fire, which keeps temperatures moderate enough that first-timers can stay buried comfortably for fifteen minutes without feeling dizzy or overheated. You put on the provided cotton yukata, lie down on the dark sand, and a staff member shovels it over you up to the neck. The weight is surprising, close to a firm, warm pressing sensation over your whole body.

The most specific thing about Hyotan Onsen is the stone drinking fountain in the courtyard, shaped like a gourd, where the spring water flows directly from the source. The water is safe to drink, though it has a faint mineral edge. Locals call it lucky spring water and claim drinking it on days that fall on the number eight brings good fortune. Whether you believe that or not, standing in the steam-thick courtyard of a facility that has won three Michelin Green Guide stars seven consecutive times, cupping your hands under a gourd-shaped spout to taste the water that also heats the sand bath, is about as Beppu as Beppu gets.