Japan Onsen Atlas温泉アトラス

We leave the space empty rather than use another onsen's photo or a generated image. If you have a usable photo, use the suggestion form.

Hokuriku & Koshinetsu · Onsen area

Reisenzan Onsen

れいせんじおんせん · 霊泉寺温泉

Nagano · 上田市

OpenNational Health Resort Onsen
Save to passport

Official classification

Spring type (therapeutic classes)

Sulfate spring

Official spring-type name (as recorded)石膏性苦味泉

Source temperature
42°C
pH
Unconfirmed
Flow rate
Unconfirmed
Radon
Unconfirmed

Appearance & feel

Water colour · Feel

Clear

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

Reachable by public transport

鉄道：北陸新幹線・しなの鉄道上田駅よりバスで約55分、自動車：上信越道東部湯の丸IC下車40分

Checked
no check date
Show on mapOpen in Google Maps

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.

Onsen areas nearby

Register sources

Data status

Name & locationPublishedCoordinatesPublishedSpring typePublishedPhotosIn preparationFacilitiesIn preparationVisiting info (dated)In preparationEditorial articleIn preparation

Updated 2026-10-09

Suggest a correction or addition