Onsen OniOnsen Oni

Search Onsen Oni

Search onsen, areas, prefectures and pages.

Hakushū Shiozawa Onsen Fossa・Maguna No Yu

白州塩沢温泉フォッサ・マグナの湯はくしゅうしおざわおんせんフォッサ・マグナのゆ

Public Bathhouse
Chubu·Yamanashi

Day Use

Yes
Mon11:00–21:00
Tue11:00–21:00
WedClosed
Thu11:00–21:00
Fri11:00–21:00
Sat11:00–21:00
Sun11:00–21:00

except Wednesdays

¥830

Bathing & Water

Natural onsen water

Uses natural hot spring water

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Dry heat sauna room

Cold BathYes

Cold water plunge bath, typically used after sauna

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

白州塩沢温泉

Hakushu Shiozawa Onsen
Chloride
+ 含硫黄
Color
colorless and transparent
Taste
slightly salty
Odor
hydrogen sulfide

Sodium-Calcium Chloride spring

pH 10.0AlkalineStrongly alkaline
Composition fingerprint1.4 g/kg dissolved · Hypotonic
Na⁺79
Ca²⁺21
Cl⁻93
CationsAnions
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Chloride Cl⁻
table-salt anion — coats the skin and holds heat in.
Known good for
  • Warmingcold sensitivity
  • Smooth skindry, rough skin
  • Cutsminor wounds

A sodium-calcium chloride spring carrying sulfur, salty and heat-retaining in character. At the wellhead its pH of 10.0 makes it strongly alkaline, giving the pronounced slippery feel of Japan's beauty-water family. It carries hydrogen sulfide, so a faint rotten-egg note and a light salty tang come through at the source. A cold-mineral-leaning low-temperature spring (33 C at source), it is reheated for bathing.

Sampled at wellhead·Analyzed Nov 29, 2024·一般社団法人 山梨県食品衛生協会·Cert no. 梨食第6-4号

Explore the water

Loading map…

2.0

1 review

5
0
4
0
3
0
2
1
1
0
SM
Sergey M
1 year ago

583. 白州塩沢温泉フォッサ・マグナの湯, Hokuto, Yamanashi Onsen for 830 yen (410 for locals). Operating hours from 11:00 to 21:00 (closed Wed). They stamp the Yamanashi 100 Onsen book. Bath photos from the internet match reality. 1. Indoor area. Breathing inside is fine. 1.1. Bath with clear water, temperature around 42°C. 1.2. Reclining bath. Clear water, temperature around 38°C. 1.3. Sauna. 1.4. Cold bath. 2. There's a stone rotenburo, but it was closed. 15.05.2025

1
2
3
4
5
6

Last updated July 3, 2026