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Suginoi Hotel

別府温泉 杉乃井ホテル

Lodging
Kyushu & Okinawa·Oita

Day Use

Yes
09:00–23:00

9:00~ last admission 22:00

¥2,000

The rate also admits you to The Aqua Garden. It runs from 2,000 to 3,200 yen depending on the season and on weekends and public holidays, so check with the hotel before you go.

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Sauna room of any kind

Cold BathYes

Cold water plunge bath, typically used after sauna

Policies & Services

TattooNo

Allows entry with visible tattoos

KidsYes

Welcomes children and families

DiningYes

A restaurant or dining room open to visitors, not only meals for overnight guests

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels to rent or borrow at the desk

ParkingYes

On-site or nearby parking available

900 spaces

杉乃井ホテル混合泉

Suginoi Hotel Mixed Spring

Operated by · 株式会社 杉乃井ホテル

Mixed source

Chloride
+ Sulfate
Color
colorless and transparent
Taste
slightly salty
Odor
odorless

Sodium Chloride-Sulfate spring

pH 8.6AlkalineHot source · 91°CHigh silica
Composition fingerprint1.9 g/kg dissolved · Hypotonic
Na⁺90
Cl⁻64
SO₄²⁻21
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
  • Circulationtired legs
  • Aches & jointsstiff shoulders

The bath water here is a blend of two wells — Sugi-2 and the geothermal power station source — sampled at the hotel's own mixing valve rather than at a wellhead. It is a sodium chloride spring with sulfate adding quiet body, moderately mineralized at 1,875 mg/kg and leaving a faint salty tang on the lips. At 91.4 °C it ranks among Japan's hottest natural sources, and its alkalinity gives the slippery feel that places it squarely in Japan's beauty-water family. A generous 379.2 mg/kg of metasilicic acid leaves the kind of silica film that makes skin noticeably smoother afterwards.

Sampled at mixing tank·Analyzed Sep 9, 2020·株式会社 東洋環境分析センター·Cert no. yZ2002147-001

Explore the water

Views

Mountains
Sea
City

Programs

About

"Grand Open-Air Bath Tanayu" renewed in July 2023. The grand open-air bath Tanayu, which spreads out in a terraced rice field style with five levels of bathtubs, was renewed and reopened in July 2023. You can enjoy the view of Beppu Bay, the city nightscape, and on clear days, even the Shikoku Sadamisaki Peninsula as borrowed scenery. The sauna area has been expanded, and Masuyu and Oto no Yu baths have been installed. Also, the adjacent outdoor swimsuit bathing facility "Aqua Garden" is open together. It is full of hot spring entertainment such as fango therapy using hot spring mud and a float healing bath where you can float in highly saline water. At night, you can see a dynamic fountain show woven with water, light, and sound.

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5.0

1 review

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Sergey M
5 months ago· edited

715. Suginoi Hotel, Beppu ★★★ This facility is part of the large hotel and entertainment complex Suginoi Palace, which has shops, arcade machines, a gym, a pool, onsen, and several hotels. The onsen open for day use can be accessed either from the hotel reception or through the main entrance to Suginoi Palace. We visited for a higaeri. The admission price is 2000-3200, depending on weekends and holidays. Higaeri is listed from 09:00 to 23:00. They stamp the Beppu Onsen-dō stamp rally. The bath photos are from the internet, and match only roughly, since we visited in the evening. The main feature of the onsen is the gorgeous four-level infinity onsen with a very impressive view of Beppu and the bay. The evening view, when visibility is good, is especially striking, when the moon reflects on the bay. 1. Indoor bath (first). The water is clear, temperature 41.5. It is comfortable to breathe inside. 2. Upper outdoor infinity bath (second). The water is clear, temperature 40.5. 3. Illuminated steam onsen sauna, located behind the upper infinity bath. 4. Next upper outdoor infinity bath (third). The water is clear, temperature 40.5. 5. Penultimate outdoor infinity bath (fourth). The water is clear, temperature 40.5. 6. Lower outdoor infinity bath (fifth), with areas to lie down. The water is clear, temperature 41.5. 7. Barrel area: 7.1. Two round barrels. The water is clear, with the proper onsen smell of sulfurous rot. Temperature 40. 7.2. Three rectangular concrete barrels. The water is clear, with the proper onsen smell of sulfurous rot. Temperature 40. 8. Sauna. 9. Cold bath. A must-visit place. A superb realization of the four-level infinity bath concept, a gorgeous view, a high-spec facility, and part of the Beppu Onsen-dō. 02.01.2026 03.04.2026

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Onsen Oni

Last updated September 18, 2026