Tokachigawa Onsen, as for, Japan even in, rare "Moor hot spring" is gushing out.
Far ancient times' era, here Tokachigawa riverbank, reeds etc. plants were growing naturally.
Those plants long time taking accumulated, formed lignite layer through gushing out hot spring is, plant-based organic matter much containing "Moor hot spring" is.
"Moor" as for, lignite etc. referring German word from is derived.
Obihiro city center etc. plain central part's underground 1,000m deeper place from gushing out hot spring's spring temperature is 50℃ around being against, Tokachigawa Onsen in underground 500～700m from gushing out things 55～60℃ and, more high temperature has become.