Kintaikyo Onsen
- Location
- Iwakuni, Yamaguchi, Japan
- Temperature
- 41 °C
- pH
- 7.2
Water profile
Relaxing — deep, immediate muscle release.
Rich in trace elements — gentle on the skin.
Soft water — natural, classic buoyancy.
Kintaikyo Onsen takes its name from the Kintaikyo Bridge—the celebrated five-arched wooden bridge spanning the Nishiki River in Iwakuni, Yamaguchi Prefecture, a masterpiece of Edo-period engineering and aesthetics that has been rebuilt to its original design after flood damage and remains one of Japan's most photographed historic structures, particularly magnificent during cherry blossom season. Siliceous and simple waters flow at this spring, offering the silica-rich skin-softening soak of Japan's bijin no yu (beauty water) tradition alongside the approachable alkaline warmth of simple mineral springs, a combination both gentle and deeply nourishing. Bathing at Kintaikyo Onsen after crossing the famous bridge or viewing it framed by cherry blossoms completes an Iwakuni visit that pairs the elegance of traditional Japanese architecture with the restorative art of the mineral spring.