Photo information
Photo information
Soren Bradley with Topographic - NASA Shuttle Radar Topography Mission (SRTM3) Admin ,Hillside - Geospatial Information Authority of Japan , https://nlftp.mlit.
CC BY 4.0
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Hokuriku & Koshinetsu · Onsen area
Sakuuminokuchi Hot spa
さくうみのくちおんせん · 佐久海ノ口温泉
Nagano · 南佐久郡南牧村
Status unconfirmed
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Official classification
Spring type (therapeutic classes)
Official spring-type name (as recorded)ナトリウム・マグネシウム－炭酸水素塩・塩化物泉
- Source temperature
- 35.3°C
- pH
- 6.6
- Flow rate
- 15 L/min
- Radon
- Unconfirmed
Appearance & feel
Water colour · Feel
Unconfirmed
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
Public transport unconfirmed
#アクセス参照。
- Checked
- no check date
Photo gallery
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
佐久海ノ口温泉（さくうみのくちおんせん）とは、長野県南佐久郡南牧村 (旧信濃国) にある温泉である。 弘法大師による開湯伝説がある。また、天明8年 (1788年) の請負証文に「湯沢の湯」として記述がある。現在の源泉は1931年に掘り広げたもの。 2025年現在施設として営業しているのは「海ノ口温泉」の一軒宿「和泉館」のみであるが、周囲にはほかにも複数温泉や鉱泉があり、総称して「佐久海ノ口温泉」といわれることもあった。
This overview is based on the lead section of the Japanese Wikipedia article "佐久海ノ口温泉" (CC BY-SA 4.0). View original page
Onsen areas nearby
Register sources
- 佐久海ノ口温泉 - Wikipedia(日本語版)Wikipedia · CC BY-SA 4.0 · 2026-10-09
- Wikidata Q134618604Wikidata · CC0 · 2026-10-09
Data status
Name & locationPublishedCoordinatesPublishedSpring typePublishedPhotosPublishedFacilitiesIn preparationVisiting info (dated)In preparationEditorial articleIn preparation
Updated 2026-10-09
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