Aoni Onsen, Kuroishi, Aomori
Lamp no Yado Aoni Onsen (Day Use)
A remote mountain bath with four settings and demanding access
Property overview
Overview
Aoni Onsen has four baths: Kenroku-no-Yu, the main-building indoor bath, Takimi-no-Yu and a mixed-gender outdoor bath. The inn describes the water as free-flowing, but it does not guarantee that all four baths are open to day visitors on a given day. Summer shuttle seats must be booked, and winter access requires a separate shuttle from Rainbow Lake.
Spring & water temperature
- Spring-source temperature
- 48°C, a Kuroishi tourism-association reference value without a new 2026 analysis date; not a fixed bath temperature
- Bathing temperature
- Not published; the inn warns that outdoor-bath water may cool in winter
- Spring source
- Aoni Onsen's own spring; the current main pages do not publish an individual source name
- Spring classification
- Simple spring; clear, colorless, tasteless and odorless
- pH
- Not published
- Flow rate
- Not published
- Water handling
- The inn describes the water as free-flowing. Four baths are listed: Kenroku-no-Yu, the main-building indoor bath, Takimi-no-Yu and a mixed-gender outdoor bath. The inn does not publish a fixed day-use opening list for each bath, so all four should not be assumed available. Bath-by-bath water addition, heating, recirculation and disinfection are not fully listed.
- Analysis date
- 48
Bathing indications
The inn lists general bathing indications including neuralgia, muscle and joint pain, frozen shoulder, limited movement, bruising, digestive conditions, sensitivity to cold, recovery after illness, fatigue and general health. These are not a treatment guarantee.
From April 1, 2026, adult admission is ¥1,000 for 10:00–15:00. The summer shuttle from Rainbow Lake must be booked in advance; winter drivers must park at Rainbow Lake and reserve a shuttle. Winter outdoor-bath temperature may fall. The inn's English page says standard shampoo, conditioner and hair dryers are not provided. Tattoo rules are unconfirmed.
Choose the room for the way you want to stay.
Check the official page for current room details and what the selected plan includes.
Meals
Check meal times before booking.
For allergies or other dietary requirements, contact the property before booking to confirm what can be accommodated.
How ryokan meal plans workLocation & access
Check the last leg of the journey.
In the mountains near Kuroishi. The summer shuttle runs between Rainbow Lake and Aoni and requires advance reservation; regular buses from Kuroishi Station are timed mainly for overnight guests. In winter, private cars cannot continue up the mountain: park at Rainbow Lake and reserve the shuttle. A short day trip by public transport is difficult.
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