posted on April 5, 2015
This place is written as [大湯沼] in Japanese.
Oyunuma is a hot spring pond with a circumference of about 1 kilometer. It features a sulfur spring gushing out from the bottom at around 130 degrees Celsius.
The name “Oyunuma” translates to “big hot spring pond” and it is the largest pond in Jigokudani.
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