Doroyu Onsen Okuyama Ryokan
泥湯温泉 奥山旅館
Day Use
YesLast reception for day-use bathing is 13:30 (last entry before the 14:30 close). The large outdoor bath closes each winter for snow, roughly November through late May, while the indoor baths and the mixed-bathing outdoor bath stay open year-round. The inn sometimes closes for a few days on short notice, so it's worth calling ahead to confirm it's open.
Adults pay 800 yen, children 500 yen, tax included. One admission covers the indoor bath, the mixed-bathing outdoor bath, and the large outdoor bath together.
Bathing & Water
Uses natural hot spring water
Site lists three distinct source springs (新湯, 天狗の湯, 川の湯) feeding the different baths, run kakenagashi (flow-through).
Open-air outdoor bath
Enclosed indoor bathing area
Bathing Arrangements
Private bath available for day-use visitors or hotel guests to reserve
A 2026 reviewer names a 貸切露天風呂 (private/reservable outdoor bath); this may be the same private hinoki bath tied to the "Koshiabura" room rather than a separately bookable bath. Not confirmed on the official site.
Private onsen bath in guest rooms, for overnight guests only
Only the room "Koshiabura" has an en-suite hinoki bath fed by onsen water; the other eight room types do not.
Shared bathing area for all genders
Policies & Services
Welcomes children and families
Highlights
Mud BathPrograms
About
Doroyu, the name means "mud hot spring", sits in a Tohoku mountain valley with naturally hot ground and fumarolic activity all around. The ryokan draws three different springs into separate baths: two kinds of sulfur water and a simple spring, which means you can actually compare different sulfur compositions in one visit. The mixed-gender outdoor rotenburo is cloudy white and smells of sulfur, with two pool levels set into the hillside.
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Last updated July 22, 2026