Onsen OniOnsen Oni

Seseragi no toki

代山温泉 せせらぎの四季だいやまおんせん せせらぎのしき

Other
Chubu·Nagano
0264-24-2626kiso-spa.com

Day Use

Yes

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

OnsenYes

Uses natural hot spring water

Policies & Services

DiningYes

Restaurant or dining open to visitors (not just hotel meal plans)

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

Water treatment

from Article 18 disclosure
  • Added water
    No
  • Reheated
    Yes
  • Recirculated
    Not disclosed
  • Disinfected
    Not disclosed
  • Bath additives
    Not disclosed

代山温泉

Daiyama Onsen

Operated by · 代山温泉スタンド

Sampled at wellhead
塩
Chloride
+ Bicarbonate · 含二酸化炭素

A cold-mineral spring (13.3 °C) of mixed sodium-calcium chloride and bicarbonate type, carrying dissolved carbon dioxide. Neutral in pH and moderately mineralized at around 2,004 mg/kg, it is reheated to about 42 °C for bathing. The chloride edge gives a faint salty body, while the bicarbonate side softens the feel; a small iron load (~17 mg/kg) adds a quiet metallic accent.

Source temperature
13.3°C
Cold mineral
Tonicity
2.00g/kg
Hypotonic
Highlights
  • Cold mineral

Analyzed Nov 6, 2019·社団法人 長野県薬剤師会·Cert no. 長野県第2号

Views

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MA
Mariia
1 year ago

Seseragi no Toki A higaeri spot in Kiso. Large deep indoor bath, temperature 41 (for the first time I liked the indoor bath more than the rotenburo). Small rotenburo in the women's section with a view of bamboo. The water is originally cold (12°C), heated to 42°C. "Rusty" with carbonic acid content. The rust on the bottom is extreme — heels and other body parts that touched the bottom turned a fun orange color. There's a restaurant, a souvenir shop where you can buy local bath salts (yu-no-moto), and a rest area. Outside there's an onsen stand (free-flowing spring tap). Everything is relatively new and fresh.