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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

https://suginoi.orixhotelsandresorts.com/contents/tanayu/ *Also use 'The Aqua Garden' Varies by season (contact required)

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Dry heat sauna room

Cold BathYes

Cold water plunge bath, typically used after sauna

Policies & Services

TattooNo

Allows entry with visible tattoos

KidsYes

Welcomes children and families

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

Rest AreaYes

Relaxation space for after bathing

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
4 months ago

715. Suginoi Hotel, Beppu ★★★ The facility is part of the large hotel entertainment complex Suginoi Palace, which includes shops, arcade machines, a gym, a swimming pool, an onsen, and several hotels. The onsens available for day visits can be accessed either from the hotel reception or through the main entrance of Suginoi Palace. We visited for a day trip. The admission fee ranges from 2000 to 3200 yen depending on weekends and holidays. They stamp the Beppu Onsen passport. Photos of the baths are from the internet and are approximate – we visited in the evening. The main feature of the onsen is a magnificent four-level infinity onsen with a stunning view of Beppu and the bay. The evening view is especially impressive on clear days when the moon reflects in the bay. 1. Indoor bath (first). The water is clear, temperature about 41.5°C. Comfortable to breathe inside. 2. Upper outdoor infinity bath (second). The water is clear, temperature about 40.5°C. 3. Steam onsen sauna with lighting, located behind the upper infinity bath. 4. Next outdoor infinity bath from the top (third). The water is clear, temperature about 40.5°C. 5. Penultimate outdoor infinity bath (fourth). The water is clear, temperature about 40.5°C. 6. Lower outdoor infinity bath (fifth), with areas to lie down. The water is clear, temperature about 41.5°C. 7. Barrel area: 7.1 Two round barrels. The water is clear, with the characteristic proper onsen sulfur smell. Temperature about 40°C. 7.2 Three rectangular concrete barrels. The water is clear, with the characteristic proper onsen sulfur smell. Temperature about 40°C. 8. Sauna. 9. Cold bath. A must-visit place. Superb realization of the infinity bath concept on four levels, magnificent view, sophisticated facility, part of Beppu Onsen.

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Onsen Oni

Last updated July 16, 2026