Chiba Nagareyama City
Spa Metsa Otaka Ryusenji no Yu
A large bathhouse with Japan’s first Dragon Sauna and a wide range of baths
- Natural Hot Spring
- Self löyly available
- Auto löyly available
- Aroma löyly available
- Finnish sauna
- Sauna Available
About Spa Metsa Otaka Ryusenji no Yu
Spa Metsa Otaka Ryusenji no Yu is a large bathhouse in Nagareyama, Chiba. It has three saunas, led by the spectacular Dragon Sauna, where five stoves run all at once, and three cold plunges of different depths and temperatures, and you can reach ultimate relaxation in an area for cooling off in the open air that is among the largest in Japan. A wide range of baths, including fine natural onsen water and five carbonated baths, is another draw. With a botanical warm-stone lounge, a coworking space and a full restaurant, it is a superb place to spend a whole day in comfort.
Hot SpringONSEN
Natural onsen
The main bathing area, where you can enjoy fine natural onsen water that could be called a gift from the forest. There is a wide range of baths, including the Hotaru no Onsen (firefly onsen) bathed in dreamlike light and a hotter bath. Stretch out in the open space, wrapped in natural warmth, and the fatigue of daily life is thoroughly soothed.
Carbonated bath jacuzzi
You can enjoy five different carbonated baths, starting with a strongly carbonated bath, along with an open-air carbonated bath and a ceramic urn carbonated bath with beautifying bubbles. Fine bubbles gently wrap your whole body, and you can savor the supreme comfort of warming slowly from the core.
SaunaSAUNA
Dragon Sauna
A spectacular sauna room lined with five stoves. Automatic löyly runs at set intervals, and on the hour, every hour, comes the Dragon Löyly, when all five stoves release their heat at once. Intense steam envelops the whole body for a dynamic, powerful sweat.
Aroma-Scented Moisturizing Salt Sauna
A mist sauna filled with aromatic scent. The room is set so that the warmth reaches right down to your feet, and mud packs and salt are always on hand. Wrapped in pleasant steam, you sweat slowly and can enjoy the feeling of minerals soaking in and your skin turning smooth.
medi sauna
An outdoor meditation sauna in the open-air area. You can pour the löyly yourself and create the humidity and heat you like. In the quiet you step away from everyday thoughts and spend a relaxed time turning inward, deeply attuned to your own mind and body.
Cold BathCOLD BATH
Forest Cold Plunge
A spacious, extra-large cold plunge where your sauna-flushed body cools down refreshingly. You can sink your whole body in with room to spare, then move smoothly on to cooling off in the open air in a cool-down area that is among the largest in Japan.
Deep cold plunge
A deep cold plunge you can stand in. Even water pressure bears on your whole body and you can cool yourself right up to your head, for a deep sense of refreshment.
Metsa Cold Plunge
A cold plunge in the men’s bath only, with water below 10°C (50°F). The water, chilled to the extreme, pulls your whole body sharply taut and cools your heated body in an instant, for a keen rush of refreshment.
Hot Stone SpaHOT STONE SPA
Warm-stone lounge
A warm-stone area with a botanical, relaxing atmosphere. You can make your way around several rooms of different character, such as the aroma salt stone room and the cool-air room, and enjoy a detox with men and women together in the special wear provided. A coworking space and a library of more than 15,000 books are also on site, so you can spend your time unwinding however you like.
Aroma Yang Guifei Room
A women-only warm-stone area inside the warm-stone lounge. Without worrying about anyone’s eyes, you can warm your body slowly, wrapped in aromatic scent, and enjoy deep relaxation and a detox for body and mind.
Facility Information
- Address
- 1-15-1 Otakanomori-nishi, Nagareyama, Chiba
- Business Hours
- 06:00〜02:00
Open Year-Round
- Closed Days
- Open Year-Round
- Gender Access
- Gender Separated
- Tattoo Policy (Communal Bath)
- OK if fully covered with designated stickers
Allowed if the tattoo can be covered with two of the bathhouse’s designated cover stickers (9.5 × 14.0 cm), sold at the front desk (stickers must be purchased and worn)
- Official Website
- View official site
Access
By car
- About 13 minutes from Nagareyama Interchange on the Joban Expressway
By train and bus
- The nearest station is Nagareyama-otakanomori Station (Tsukuba Express and Tobu Urban Park Line)
- About 35 minutes from Tokyo Station
- About 25 minutes from Akihabara Station
- About 20 minutes from Tsukuba Station
- About 30 minutes from Funabashi Station
About 2 minutes’ walk from the west exit of Nagareyama-otakanomori Station. Parking available
Visited by the Editor-in-Chief
The Editor-in-Chief visited in person in December 2025
Natural onsen, sauna, and cold plunge — all absolutely perfect
Read the full review
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