Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
LaQua is a large urban hot spring spa complex in the Tokyo Dome City entertainment district in Bunkyo Ward, central Tokyo, drawing deep geothermal waters from below the metropolitan urban fabric to provide bicarbonate and calcareous mineral bathing to city residents and tourists without the need to travel to a mountain or coastal resort. Opened as part of the Tokyo Dome City development, LaQua offers a range of bathing facilities including outdoor baths, saunas, and relaxation areas within a contemporary architectural setting adjacent to the Tokyo Dome baseball stadium, the amusement rides of Tokyo Dome City Attractions, and the shopping and dining facilities of the broader complex. The deep urban hot spring draws from a geothermal source tapped beneath the dense urban geology of Tokyo, demonstrating that hot spring bathing culture remains vitally relevant in the heart of one of the world's largest megacities, available to millions of urban residents without requiring a journey to the traditional onsen countryside.
Insider tip — LaQua is a sophisticated urban spa complex integrated into the Tokyo Dome City entertainment complex in central Tokyo, drawing naturally dark, bicarbonate-rich thermal water called kuroyu from 1,700 meters below the city. The black colour of the water comes from dissolved humic substances, and the mineral-rich bath is said to smooth skin and ease fatigue after a long day exploring the capital. The rooftop open-air baths offer a surreal contrast of steaming water against the glittering Tokyo skyline. Admission includes unlimited use of saunas, jacuzzis, and relaxation lounges, making it ideal for a late-night recovery session.