Osawa Onsen
大沢温泉 湯治屋
Iwate 花巻市
岩手県 花巻市
Osawa Onsen
大沢温泉 湯治屋
Iwate 花巻市
岩手県 花巻市
Onsen RyokanDay-use BathFree-Flowing Onsen
AT A GLANCE
Osawa Onsen is a simple spring (pH 9.0, alkaline). Naturally flowing (no recycling or dilution). Contains ≥50 mg/kg of metasilicic acid, certified as a beauty spring. Per Japan's Ministry of the Environment guidelines, indicated for autonomic disorder, insomnia, and fatigue recovery.
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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
Tattoo
No tattoos
Bathing wear (Yuami-gi)
Not available
About tattoos and onsen
Hours
Weekdays: 07:00〜21:00
Weekends & holidays: 07:00〜21:00
Last admission for day-use bathing is 20:30. The mixed-gender open-air bath 'Osawa-no-Yu' (大沢の湯) is for women only from 20:00 to 21:00.
Closed days: Irregular holidays
Transit
From JR Hanamaki Station (JR花巻駅), take a bus for approx. 25-30 minutes and get off at Osawa Onsen bus stop (大沢温泉バス停). From Shin-Hanamaki Station (新花巻駅), take a bus to Hanamaki Station (花巻駅) for 20 minutes. Free shuttle bus service available from Hanamaki Station and Shin-Hanamaki Station (reservation required).
Parking
Available (Free, 100 spaces)
Day use fee
¥700Children: 400 JPY (tax included). On some days, usage may be limited to a certain duration.
Phone
Facilities
Rest AreaPower OutletsWi-FiShopDining HallShared KitchenFree Waiting RoomHair Dryer
Languages supported
EN中（简）中（繁）한
House rules
Entry is denied to individuals with tattoos/body art or those who are heavily intoxicated. Bringing in items that may disturb other guests, animals, flammable/combustible materials, items emitting foul odors, or any other items prohibited by law is forbidden. Commercial activities within the facility are prohibited.
Sources
This information may change without notice. Please contact the facility directly for accurate details.
Last updated: 6/10/2026
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REVIEWS
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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