Saito Onsen

Saito, Miyazaki (Kyushu), Japan

Location: Saito, Miyazaki (Kyushu), Japan
Water type: bicarbonate
Temperature: 40 °C
pH: 8

Water profile

Thermicity

Sedative

40 °C

LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation

Restorative

LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy

Standard buoyancy

LowHigh

Soft water — natural, classic buoyancy.

BicarbonatesSodiumCalcium

Saito Onsen is located in Saito City, Miyazaki Prefecture, a city in the inland agricultural heartland where extensive prehistoric burial mounds (kofun) dot the surrounding countryside, representing one of Japan's most significant concentrations of ancient tumuli from the Kofun period (250–538 CE). The siliceous thermal waters here serve a quietly proud city whose rich archaeological heritage is displayed in the Saitobaru Archaeological Museum and the adjacent burial mound park — an open-air landscape of grass-covered ancient imperial tombs stretching across the Miyazaki plain. These hot springs provide a restorative pause for visitors exploring this remarkable and often overlooked corner of Japan's prehistoric heritage.

Insider tip — Saito Onsen serves a quiet inland city in central Miyazaki Prefecture, set among the rolling hills and cedar forests that typify this part of Kyushu. The bicarbonate-rich water has a smooth, slightly alkaline character that leaves skin noticeably soft. Saito is also known as the site of the ancient Saitobaru Burial Mounds, one of Japan's largest kofun tumuli complexes, making it a rare combination of history and thermal culture. Visit in autumn when the forested hillsides blaze with color.

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