Daitokan

大東館だいとうかん

Lodging
Chubu·Shizuoka

Day Use

Yes

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

岡191号・岡152号・岡137号 混合泉

Oka No. 191 / No. 152 / No. 137 Mixed Spring

Operated by · 株式会社大東館

Mixed source

Sampled at mixing tank
Simple
Classification

Sodium-Calcium Chloride-Sulfate spring

A blended spring drawing on three wells — Oka No. 191, No. 152, and No. 137 — sampled from the storage tank in Ito's Suehiro neighborhood. The wellhead temperature is a hot 44.2 °C, but the total dissolved solids sit at a light 808 mg/kg, placing it firmly in simple thermal territory. Weakly alkaline at pH 8.2, the water reads soft on the skin, with sodium leading the cations and chloride and sulfate sharing the anion column almost evenly.

pH
8.20
Weakly alkaline
Source temperature
44.2°C
Hot
Tonicity
0.81g/kg
Hypotonic
Free CO₂
8.80mg/kg
Low
Color
almost colorless and transparent
Taste
faintly salty
Odor
odorless

Analyzed Aug 25, 2023·芝浦セムテック株式会社·Cert no. 第H2302395号

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SM
Sergey M
1 year ago

239. Daitokan, Ito Visited for higaeri at 1100 with towels (listed hours 14:00–22:00). They stamp the 60 Onsen of Shizuoka 24/25 booklet. Located in the building next to the well-known Yokikan from the travel chat. Higaeri gives access to the public bath (which rotates M/F) and three private baths on a first-come-first-served basis. I managed to visit two private and the public bath (no rotenburo). All three baths had the same water composition on their placards. 1. Private outdoor bath. Located separately — you need to leave the hotel building itself (there are even special rubber slippers provided for this). Very cozy in the evening. Clear water, temperature 39. 2. The passage to the indoor public and private baths goes through a cave, which adds great atmosphere. The indoor bath consists of two sections: the left one at 38.5, the right at 41. Clear water, comfortable to breathe inside. 3. Private Goemon bath with hellish cauldrons. Super cool, atmospheric, and powerful. Especially after walking through another cave segment inside the ryokan. Clear water in the cauldrons, one at 41.5, the other at 43.5. A bit stuffy inside. An excellent place for higaeri — long time slot and amazing private baths. Haven't been to the second public onsen yet — it's listed as having a rotenburo. If staying at Yokikan — the perfect combo would be to do higaeri at this ryokan and expand your onsen experience.