Recommended onsen in Iwate

2 picks ranked from onsen analysis-sheet data (official, verified and free-flowing sources prioritised)

Try your own diagnosis
Osawa Onsen Simple Spring
Simple SpringVerified
Osawa Onsen
大沢温泉 湯治屋
Iwate 花巻市· 大沢温泉 (大沢の湯)Osawa Onsen
A beauty hot spring with a rich texture that deeply moisturizes the skin.

Osawa Onsen, a famed hot spring in Iwate reportedly beloved by author Kenji Miyazawa, draws from the "Osawa-no-Yu" source. It boasts a silky, lotion-like texture, a gift of its high alkalinity at pH 9.0. Soaking in this smooth water, like a fine lotion, gently exfoliates the skin, leaving it feeling exceptionally smooth after your bath. It's a gentle, healing spring that soothes both mind and body, perfect for those seeking a peaceful escape to unwind and care for themselves.

Onsen RyokanDay-use Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Alkaline9
TEMP51.2℃
KEY MINERALS
Fluoride ion
5.8 mg/kg
Check Availability & Rates
PRIncludes affiliate links
Agoda楽天じゃらん
Osawa Onsen Sansuikaku Simple Spring
Simple SpringVerified
Osawa Onsen Sansuikaku
大沢温泉 山水閣
Iwate 花巻市· 大沢温泉 (大沢の湯)Osawa Onsen
A beauty hot spring with a rich texture that deeply moisturizes the skin.

Osawa Onsen, a famed hot spring in Iwate reportedly beloved by author Kenji Miyazawa, draws from the "Osawa-no-Yu" source. It boasts a silky, lotion-like texture, a gift of its high alkalinity at pH 9.0. Soaking in this smooth water, like a fine lotion, gently exfoliates the skin, leaving it feeling exceptionally smooth after your bath. It's a gentle, healing spring that soothes both mind and body, perfect for those seeking a peaceful escape to unwind and care for themselves.

Onsen RyokanPrivate Rental Bath
StimulationBactericidalSkin BeautyHeat RetentionRelaxation
pHStrongly Alkaline9
TEMP51.2℃
KEY MINERALS
Fluoride ion
5.8 mg/kg
Check Availability & Rates
PRIncludes affiliate links
Agoda楽天じゃらん

About onsen in Iwate

The benefits of an onsen vary by spring type. Iwate has a wide variety of spring types, each with different characteristics. my Onsen Techo ranks the onsen best suited to your symptom and area based on analysis-sheet data, which is mandated for display under Article 18 of Japan's Hot Spring Act. Each onsen page shows mineral visualisations, bathing tips and booking options.