切干大根 · CC BY-SA 4.0
Toyotomi Onsen
豊富温泉
Hokkaido · 100 Onsen to Know Japan — No. 5
IodineChlorideBicarbonate
They drilled for oil and struck hot water: an amber, petrol-scented spring that draws long-stay bathers from all over Japan.
Spring type (therapeutic classes)
Iodine spring
Added to the therapeutic classes in 2014. Common in seawater-derived springs; the water can be tinted yellow to brown.
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