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Seaside Hotel Mimatsu OOETEI

シーサイドホテル美松大江亭シーサイドホテルびまつおおえてい

Rooftop open-air baths with Beppu Bay views at a bayside ryokan

Lodging
Kyushu & Okinawa·Oita

Day Use

Yes
06:00–09:00, 15:00–00:00

Only for guests staying at other hotels in the Beppu Onsen Hotel Group

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaNo

Sauna room of any kind

Bathing Arrangements

Private BathNo

A private bath you can reserve for yourself or your group

Room OnsenYes

Private onsen bath in guest rooms, for overnight guests only

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

DiningYes

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

WashingYes

Shower, wash stations, soap and shampoo provided

ParkingYes

On-site or nearby parking available

鶴丸城の湯

Tsurumarujo no Yu

Operated by · 株式会社別府温泉ホテル

曹
Bicarbonate
+ Chloride
Color
faintly yellow-brown and clear
Taste
faintly salty
Odor
very faint odor

Sodium Bicarbonate-Chloride spring

Hot source · 52°CHigh silica
Composition fingerprint1.4 g/kg dissolved · Hypotonic
Na⁺82
HCO₃⁻67
Cl⁻26
◀ CationsAnions ▶
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Bicarbonate HCO₃⁻
"soda" — softens skin, leaves it smooth.
Known good for
  • Smooth skindry, rough skin
  • Aches & jointsstiff shoulders
  • Warmingcold sensitivity

A sodium-led bicarbonate-chloride hot spring at 51.6 °C, with a chloride sub-type adding a salty edge to the bicarbonate softness. Weakly alkaline at pH 8.0 and soft on the skin, it sits in the Japanese beauty-water family. A generous 181 mg/kg of metasilicic acid leaves the kind of silica film that makes skin feel noticeably smoother. The water carries a faintly yellow-brown tint and a mild salty note on the lips.

Sampled at mixing tank·Analyzed Jan 15, 2018·大分県薬剤師会検査センター·Cert no. 大薬検 第 7R-3001005号

Explore the water

Views

Sea

About

A ryokan on Beppu's Kitahama waterfront, with a rooftop open-air bath (rotenburo, 露天風呂) that looks out over Beppu Bay. The onsen water flows fresh (kakenagashi, 源泉掛け流し). There is also a large indoor communal bath on the third floor, and select rooms come with their own private open-air onsen. No day-use bathing; overnight guests can also use the baths at two sister hotels, Tenkyu Yubo Seikaiso (天空湯房清海荘) and Hotel Sansenkan (ホテル三泉閣), at no extra charge.

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4.0

1 review

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Sergey M
2 years ago· edited

156. Seaside Hotel Mimatsu OOETEI, Beppu ★★ I stayed one night, did not have meals there, and the hotel itself is a little old, but pleasantly so. It is on the waterfront, with an exit nearby to a steep promenade area, not far from the station. It is not included in Onsen-do Beppu, so they do not stamp the 88 onsen stamp rally. The onsen should be available free of charge for day-use bathing when staying at other hotels in the Beppu Onsen Hotel Group, from 15:00 to 00:00 and from 06:00 to 09:00. At the same time, if you stay at Mimatsu OOETEI, you can use the reciprocal free day-use bathing at hotels in this group. The Beppu Onsen Hotel Group includes: Sea Wave Hotel, Hotel Fujiyoshi, Hotel Hayashi, Hotel Sansenkaku, Seaside Hotel Mimatsu OOETEI, Seikaiso, Beppu Station Hotel, Business Hotel Star (no onsen of its own). The indoor bath is separate downstairs. The water is clear with fine lime deposits, and the bath is entirely wooden, with a hot temperature. Breathing is fine. The upper outdoor bath is on the roof. The view is excellent, but to get a good photo, you need to get out of the bath. From there, you can see both the bay and the mountain on the right. The water is clear, and the temperature is between warm and hot. The rooftop view and the overall atmosphere are very good, so it is recommended for a visit. 30.04.2024 01.05.2024

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Last updated October 11, 2026