Tatsumaki Jigoku (Spout Hell)

Tatsumaki Jigoku, the "Spout Hell" or "Tornado Hell," is the only geyser among Beppu's seven hells and one of just two located in the northern Shibaseki district, immediately beside the Blood Pond Hell. Where the other hells are places of constant, brooding heat, Tatsumaki is a performance: roughly every 30 to 40 minutes the geyser erupts, blasting a jet of scalding water and steam from the ground in a spectacle that draws visitors to gather on the tiered stone benches arranged like a small amphitheatre around the vent.

The eruptions last several minutes each. A flat stone slab has been mounted above the geyser's mouth to cap the jet for safety - without it, engineers estimate the boiling column would rocket some 30 metres into the air. Even restrained, the sight and sound are dramatic: a sudden roar, a surge of superheated water at around 105 degrees Celsius, and a billowing cloud of steam that momentarily engulfs the viewing area before the vent falls quiet and the countdown to the next eruption begins.

Because the timing is predictable, a visit to Tatsumaki rewards a little planning. Staff post the next eruption time at the entrance, so the smart approach is to check it on arrival, walk next door to see Chinoike Jigoku, and circle back to claim a seat a few minutes before the show. Arriving without checking risks either a long wait or a near miss. The stone benches fill quickly on busy days, so latecomers may end up standing at the back with a partly obscured view.

Tatsumaki is designated, together with the other hells, as a national Place of Scenic Beauty, and it forms the natural finale of the Beppu Jigoku Meguri hell tour. Paired with the crimson Chinoike right beside it, it gives the Shibaseki leg of the tour a distinct character from the walkable Kannawa cluster: fewer crowds, a wooded backdrop, and the anticipation of a timed natural event rather than a static pond.

The site has the same visitor comforts as the other major hells - restrooms, a gift shop selling yunohana bath salts and local snacks, and covered seating. The viewing area is compact and largely step-free once you reach the amphitheatre, though the walk from the car park involves a gentle incline. Allow about 30 minutes if your timing lines up with an eruption, or budget extra to wait for the next one.

For geology enthusiasts, Tatsumaki is a rare chance to watch a genuine geyser in Japan, where such formations are far less common than in places like Yellowstone or Iceland. Combined with the red mud of Chinoike, the blue depths of Umi and the bubbling grey cauldrons of Oniishibozu, it completes a tour that showcases just how varied and violent Beppu's underground plumbing really is - a city that quite literally sits on the boil.