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Hokuriku & Koshinetsu · Onsen area
Ōshio Onsen
おおしおおんせん · 大塩温泉
Nagano · 上田市
Official classification
Spring type (therapeutic classes)
Official spring-type name (as recorded)硫酸塩泉
- Source temperature
- 39°C
- pH
- Unconfirmed
- Flow rate
- Unconfirmed
- Radon
- Unconfirmed
Appearance & feel
Water colour · Feel
Colour and feel are listed only where a source states them. They vary by day and by bath.
This area has basic information only. In-depth articles are being added.
Facilities in this area
Facilities come from the register (Wikipedia, OpenStreetMap, official sites). Those marked "natural spring unconfirmed" are listed on the basis of their name only.
No facility information yet.
Getting there
鉄道：北陸新幹線・しなの鉄道上田駅よりバスで約60分、自動車：上信越自動車道東部湯の丸ICより40分
- Checked
- no check date
Visitor reviews
No reviews yet. While the review platform is being prepared, we do not display fictional reviews or ratings.
Review posting is in preparation, with visit date, facility, comments on water, scenery and access, photos, language and reporting.
Overview
大塩温泉（おおしおおんせん）は、長野県上田市（旧国信濃国）にある温泉。
This overview is based on the lead section of the Japanese Wikipedia article "大塩温泉 (長野県)" (CC BY-SA 4.0). View original page
Register sources
- 大塩温泉 (長野県) - Wikipedia(日本語版)Wikipedia · CC BY-SA 4.0 · 2026-10-09
- Wikidata Q11434141Wikidata · CC0 · 2026-10-09
Data status
Updated 2026-10-09
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