Hoshi Onsen
Image: Agoda
PR · Agoda

Hoshi Onsen

法師温泉長寿館
Verified

Gunma Minakami, Tone District

群馬県 みなかみ町

Onsen RyokanDay-use BathFree-Flowing Onsen

AT A GLANCE

Hoshi Onsen is a sulfate spring (pH 8.5, alkaline). Naturally flowing (no recycling or dilution). Per Japan's Ministry of the Environment guidelines, indicated for wound healing and peripheral circulation disorders.

SOURCES
♨Hoshi Onsen (Asahi no Yu)
法師温泉(旭の湯)
Calcium-Sodium Sulfate Hot Spring
硫塩
Sulphate SpringpH 8.541.5℃
See effects, components & details

If a source spring listed for this facility looks incorrect, please contact us.

How Long to Stay (Toji)
Start with 2 nights / 3 days

Japan’s Ministry of the Environment notes that even a short stay refreshes you. For a full therapeutic cure, around 2–3 weeks is the guideline.

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Hoshi Onsen

From¥18,700/ person / night (tax incl.)
4.4(534)

Approx. lowest rate (varies by date & guests)

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Sample caption

Hoshi Onsen (Minakami, Tone District) Sulphate Spring / pH 8.5 / 41.5℃ #onsen #minakami #sulphatespring https://onsen-analysis.com/en/onsen/hoshi-onsen?utm_source=card&utm_medium=social&utm_campaign=onsen_card

USAGE
Free-Flowing Onsen
Pure spring water — no dilution, no recirculation
HeatedNo
DilutedNo
RecycledNo
FilteredNo
DisinfectedNo
AdditivesNo
▸Note

The temperature, pH and component values shown here are based on the hot spring analysis (source). Actual values in the bath may differ depending on heating, dilution, recycling and filtration. Please check current usage status at the facility.

FACILITY INFO
Official site
Official siteOpen
Hours
Weekdays: 11:00〜13:30
Weekends & holidays: 11:00〜13:30
Day-use of facilities is available until 2:00 PM. Hoshi no Yu (法師乃湯) is a mixed-gender bath, but there is a ladies' time from 8:00 PM to 10:00 PM. Please note that reception may close earlier than scheduled due to congestion, especially on Sundays and long holidays, when it might close in the morning.
Closed days: Every Wednesday (plus irregular holidays). Day-trip bathing and lunch breaks are not available during the New Year holidays.
Transit
From JR Jōetsu Shinkansen Jōmō-Kōgen Station (上毛高原駅), take a bus bound for Sarugakyō (猿ヶ京) to the last stop, then transfer to a bus bound for Hōshi Onsen (法師温泉) and get off at the last stop, Hōshi Onsen Entrance. Approximately 40 minutes from Kan-etsu Expressway Tsukiyono IC (月夜野IC) via National Route 17. We do not offer shuttle services, but there are 4 municipal buses (paid) per day operating between Sarugakyō Onsen (猿ヶ京温泉) and Hōshi Onsen (法師温泉). The municipal bus operates only 2 services in the morning and 2 in the afternoon.
Parking
Available, 50 spaces, Free, First-come, first-served
Day use fee
¥1,500Children (3 years old to elementary school age) 500 yen. Day-trip bathing and lunch breaks are not available during the New Year holidays.
Phone
0278-66-0005
Facilities
Public BathOpen-air BathShopVending MachinesBanquet HallIrori (Traditional Japanese Hearth)
House rules
Hoshi no Yu (法師乃湯) is a mixed-gender bath, but there is a ladies' time from 8:00 PM to 10:00 PM.
Sources
Rakutenenjoy-minakami.jphitou.or.jpOfficialRakutenJalannihon-hitou.orgspa.or.jp
This information may change without notice. Please contact the facility directly for accurate details.
Last updated: 6/17/2026
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✨ The descriptions, catch phrases, and translations on this page are generated by AI (Claude). pH, temperature, and component values are OCR-extracted from the official analysis report. Learn more