Weekday admission is ¥2,715 (tax included); weekends and holidays are ¥3,155. Activities such as yoga, table tennis, or dining are booked and charged separately from admission unless stated otherwise.
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
Capabilities
Mixed BathingNo
Shared bathing area for all genders
Policies & Services
TattooNo
Allows entry with visible tattoos
DiningYes
Restaurant or dining open to visitors (not just hotel meal plans)
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
Warmingcold sensitivity
Cutsminor wounds
A sodium-led bicarbonate spring with a chloride sub-type — the classic 'jūsō-sen' style softened by a salty edge. Weakly alkaline and gentle on the skin, it sits in the Japanese 'beauty-water' family. At the wellhead the water shows a yellow, faintly turbid cast with visible gas evolution, lifted as a 35 °C source by pump.
Sampled at wellhead·Analyzed Dec 18, 2023·株式会社エオネックス
Ren is a modern day-use and overnight spa complex on Kobe's waterfront, drawing its own natural hot-spring water from 1,150 meters underground. Reviewers describe the water as smooth and silky on the skin. The bathing area combines an indoor bath and an outdoor rotenburo, backed up by two contrasting saunas, a hot Finnish-style dry sauna and a cooler aroma mist sauna, plus a lava-stone ganbanyoku room. There's also an indoor pool, an outdoor heated pool, a gym, and a restaurant, so a day here can easily run long. Sea views come and go by floor: the ground-floor day-use bath faces inward, while the upper-floor suites (with their own half-open-air baths fed straight from the spring) look out over Kobe port. A free shuttle bus connects the hotel with Sannomiya, about five minutes away. Ren also holds Ministry of Health, Labour and Welfare certification as both a hot-spring and an exercise health-promotion facility, one of only two places in Japan with both.
357. Kobe Minato Onsen Ren ★
A modern super sento with onsen water, priced at 2300-2700, about 20 minutes from Kobe Station, all in one complex with a hotel. Nearby there is a waterfront promenade with a view of Kobe Tower, especially nice in the evening. The entrance to the public onsen is slightly to the right of the hotel entrance. Opening hours are listed as 06:00 to 24:00. Toreco cards are issued for the onsen, but at the public onsen reception they could not find one for me, or did not want to, so maybe the cards are available in the hotel part. There is a restaurant, massage, a shop, and fitness. There is a stone bath. The bath photos are only partly accurate, because of the odd photography it looks a bit distorted in person, and the waterfall was not working when I was there, but overall it looks like this.
The place is clean and ready to handle a large flow of people, but I would say it lacks a bit of soul, and the staff also felt like part-timers, though I had no specific complaints or remarks. You can find information that there is an onsen on the roof, but it is only available if you stay overnight at the hotel.
1. Outdoor area. The main feature is a large rotenburo in stone, but without a view. There is a nuance with the view, if you look at the rotenburo itself from the outside it looks very nice, but when you sit in it and look out, the building facade awkwardly ruins the picture.
1.1. Multi-level stone bath. Judging by the structure and photos, there should be a small waterfall on the upper level, but it was not working when I was there, maybe because of the late hour. The water is clear. On the upper level the temperature is 41-42, on the second and first levels it is 40-41. On the first level there is a lounging area off to the side.
1.2. Area with water directly from the source, as indicated on the sign. The water is clear brown, around 40.
1.3. Walking shallow bath.
2. Indoor area. It is comfortable to breathe.
2.1. Bath with clear water, 40.
2.2. Bath with carbonated water, 38.
2.3. Herbal bath (there were bags with some kind of herbs), 40.
2.4. Sauna.
2.5. Cold bath.
The place may feel a bit soulless and is expensive, but the rotenburo is pleasant, the location is good, and there is a waterfront promenade nearby with a great view. It is worth considering when visiting Kobe, but not as the first priority, and I would recommend going in the evening, without daylight.
07.01.2025
