Onsen OniOnsen Oni

New Hakkeien

ニュー八景園ニューはっけいえん

Other
Izunagaoka Onsen
Chubu·Shizuoka
055-948-1500hakkeien.jp

Day Use

Yes

Bathing & Water

OnsenYes

Uses natural hot spring water

伊豆長岡温泉(混合泉)

Izu-Nagaoka Onsen (Mixed Source)

Operated by · 伊豆長岡温泉事業協同組合

Mixed source

Sampled at mixing tank
湯
Simple
Classification

Sodium Chloride-Sulfate spring

A blended source of Izu-Nagaoka Onsen, classified as a hot (62.5 °C) alkaline simple thermal spring. With pH 9.3 the water gives the slippery, soft-on-the-skin feel of the Japanese 'beauty-water' family, even though total mineralization sits at a modest 0.631 g/kg. The standout is metasilicic acid at 65 mg/kg — a generous reading that leaves the kind of silica film bathers feel as noticeably smoother skin afterwards.

pH
9.30
Alkaline
Source temperature
62.5°C
Hot
Tonicity
0.63g/kg
Hypotonic
Flow rate
500L/min
High
Color
colorless and clear
Taste
tasteless
Odor
odorless
Highlights
  • High silica
  • Top-decile alkaline

Analyzed Aug 15, 2024·一般財団法人 静岡県生活科学検査センター

Views

Mountains
Forest

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SM
Sergey M
1 year ago

509. New Hakkeien, Izunokuni, Shizuoka ★★ Visited for higaeri at 1320 yen. Higaeri available from 11:00 to 24:00. They stamp the ICOI Project x Love Live! Sunshine temporary stamp rally. They sell the Yukemurichou stamp. 1. Outdoor zone. Great view of the city, mountains, and potentially Mt. Fuji. Fuji wasn't visible during my visit, so the Fuji photo is from the internet. 1.1. Stone bath with a view. There's a beam fence, but it doesn't significantly ruin the view from the bath. Has 4 reclining zones. Clear water, slight carbonation effect (stronger near the reclining zones). Temperature 39-40. 1.2. Round bath, clear water, temperature 40-41. 1.3. Round cold bath. 1.4. Sauna. 2. Indoor bath with clear water, temperature 40. View through glass of the city, mountains, and the outdoor zone. Great rotenburo. Was excellent even without Fuji, and if the mountain is visible too, it'd be incredible. Recommended for a visit. 09.05.2025