Okufuji Nana Onsen
奥藤七温泉おくとうしちおんせん
Unmanaged wild sulfur spring above Toushichi Onsen
Wild Onsen
Tohoku·Iwate
Bathing & Water
Natural onsen water
Uses natural hot spring water
Indoor BathNo
Enclosed indoor bathing area
Bathing Arrangements
Mixed BathingNo
Shared bathing area for all genders
Policies & Services
WashingNo
Shower, wash stations, soap and shampoo provided
ParkingYes
On-site or nearby parking available
About
A wild hot spring (yato, 野湯) on the slopes above Toushichi Onsen (藤七温泉), with no facilities at all. The water surfaces naturally in open pools and runs a murky grayish-green from sulfur. The surrounding ground has active steam vents, and the adjacent Saiunso (彩雲荘) facility has posted warnings about burn risk in the area.
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Last updated September 19, 2026