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Daimaru Besso

大丸別荘おおまるべっそう

Lodging
Kyushu & Okinawa·Fukuoka

Day Use

Yes
11:30–16:00, 17:30–22:00

day-use meals + onsen

¥8,690

meal plan for ¥8,690-¥18,700

Bathing & Water

Natural onsen water

Uses natural hot spring water

Indoor BathYes

Enclosed indoor bathing area

Policies & Services

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

二日市温泉 大丸別荘 B泉

Futsukaichi Onsen Daimaru Besso Spring B

Operated by · 二日市温泉 大丸別荘

Simple
Color
colorless and transparent
Taste
tasteless
Odor
faint hydrogen sulfide

Sodium Chloride-Bicarbonate spring

pH 8.6AlkalineHot source · 38°CHigh radon
Composition fingerprint0.6 g/kg dissolved · Hypotonic
Na⁺95
Cl⁻45
HCO₃⁻34
SO₄²⁻13
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
  • Aches & jointsstiff shoulders
  • Smooth skindry, rough skin
  • Recoveryfatigue, stress

Spring B at Daimaru Besso in Futsukaichi Onsen is a sodium-led alkaline simple thermal spring. At pH 8.59 it is alkaline with a slippery, soft feel that places it in Japan's beauty-water family. The water runs colorless and clear at the source, carrying only a faint hydrogen sulfide note, and at 588 mg/kg dissolved solids it is lightly mineralized and gentle on the body. It also carries enough radon to fall in the radon-bearing 'hormesis' tradition.

Sampled at wellhead·Analyzed Jul 4, 2024·株式会社再春館安心安全研究所·Cert no. 第K2400033-1

Explore the water

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3.0

4 reviews

from 1 reviewer

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SM
Sergey M
1 year ago

Food for one at Daimaru Besso 12.01.2025 13.01.2025

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Sergey M
1 year ago· edited

406. Daimaru Besso, Futsukaichi Onsen, Fukuoka (pt.3 - onsen) ★ As for the baths, there are two in the ryokan overall, but the second one is available either only for certain rooms or for a separate building. In my case, only the bath shown in the photo from the infamous news reports was available. The indoor L-shaped bath is in a spacious room. In the evening and in the morning there was a lot of steam, so you could not see anything a few meters away. At the same time, it was comfortable to breathe. Also, there are windows along the edge of the bath that you can open a little to your liking. In the main part of the bath there is a deeper section, then a shallow area, and it ends with utaseyu (you can sit on a chair or stand). The water is clear, and the temperature varies slightly in different spots, 41-43. Overall, it is pleasant to be in the onsen, even though there is only one bath, it is quite strong. As for the ryokan side, it is a strong place, service, kaiseki, Japanese garden, spacious room, ryokan decor. On the onsen side, for this price range I would have liked more, but still, overall I was satisfied. 12.01.2025 13.01.2025

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Sergey M
1 year ago· edited

406. Daimaru Besso, Futsukaichi Onsen, Fukuoka (pt.2 - garden) ★ A really nice feature of Daimaru Besso is the inner Japanese garden. It is small, but pleasant to look at both during the day and late in the evening. 12.01.2025 13.01.2025

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Sergey M
1 year ago· edited

406. Daimaru Besso, Futsukaichi Onsen, Fukuoka (part 1, ryokan and room) ★ I stayed overnight with meals included. A notorious ryokan. In 2023, after the discovery of falsified water inspection records at the onsen, which led to a significant excess of bacterial levels, the ryokan's manager took his own life. The ryokan itself is spacious and can accommodate a large number of guests. From Sunday to Monday there were quite a lot of visitors, Japanese guests and tourists from nearby Asian countries. The staff does not speak much English, but they really try hard to provide good service, they show and explain everything from the reception to the room and the details. The room is spacious, with two table options, a Japanese-style one on the floor and a regular one with chairs, which is very convenient for me. There is a wooden bath in the room, with tap water. The kaiseki was tasty, it is brought to the room, and you can choose which table the meal will be served at. 12.01.2025 13.01.2025

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Last updated July 21, 2026