Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Ritto Onsen is a welcoming hot spring in Ritto city, a compact municipality in southern Shiga Prefecture situated between Lake Biwa and the foothills of the Suzuka and Koka ranges. The bicarbonate thermal waters are appreciated for their gentle, skin-softening character, offering a restorative option for visitors exploring the industrial and agricultural heartland of southern Omi. The city is notable as a logistics hub for the Kansai region, but the onsen offers a quiet counterpoint to commercial activity, reflecting the broader Japanese tradition of finding thermal respite in even the most functional of urban settings.
Insider tip — Ritto Onsen taps bicarbonate-rich groundwater beneath the southern Shiga plain, between Lake Biwa and the Yasu River floodplain. The mild 38°C water makes it suitable for long, leisurely soaks without overheating. Facilities here cater predominantly to locals commuting from Kyoto and Nagoya, preserving an everyday sento atmosphere. The area is close to the ancient Tokaido highway, adding a quiet historical dimension to any visit.
