My Nagoya sauna trip was originally planned around trains.
The facilities I had my eye on were concentrated within Nagoya city, so that made sense.
But then I found it.
A place I absolutely had to visit while I was out in Aichi.
That place was Tenkou no Yu, located in Tajimi City, Gifu Prefecture. Tenkou no Yu is the kind of spot that's genuinely difficult to reach without a car. That's exactly why this Nagoya sauna trip ended up being a road trip. And as it turned out, that decision led to an extraordinary experience — because Tenkou no Yu was every bit as incredible as I'd imagined.
From Owari-Seto Station in Aichi, it's a 20-minute drive toward Tajimi City in Gifu. As I made my way up a single-lane mountain road, a massive facility caught my eye even from a distance. A large sign reading Tenkou no Yu came into view. The parking lot alone was enormous. I passed through the noren curtain and headed to the front desk. The interior felt like a traditional hot spring inn. After walking down a long corridor, I finally spotted the entrance to the main bathing area. I stripped off my clothes at the locker room and stepped inside. The space opened up before me. Right at the entrance was the main sauna room, and directly in front of it, a 7°C cold plunge bath. Next to that, a 16°C cold plunge. Both use natural groundwater. There were also indoor hot spring baths to enjoy, where plenty of people looked like they'd happily lost consciousness from sheer bliss. The outdoor baths caught my eye too, but I decided to rinse off, warm up, and then explore.
Heading out to the outdoor area, I found two barrel saunas with distinctly different concepts, plus a 14°C cold plunge bath outside as well. Saunas and cold plunge baths seemed to be everywhere I looked. At the center of the outdoor space was a free-flowing natural hot spring bath, and again, more than a few people appeared to have drifted off into a state of pure bliss. Continuing further, I reached what's billed as one of the largest outdoor relaxation spaces in Japan. Honestly, I'd never seen an outdoor relaxation area this big before. The space was wide enough to fit a futsal court, lined with an enormous number of chairs. No matter how crowded it gets, running out of seating seems practically impossible.
This facility is, without a doubt, among the very best in Japan.
Having done my reconnaissance, I entered the main sauna. The moment I stepped in, a heavy, damp heat enveloped me. When I encounter a truly great sauna, I often describe the heat as "heavy." What do I mean by that? The heaviness comes from humidity. A high-humidity sauna makes the air feel dense. There's a rich, clinging moisture to it, and it feels far hotter than the thermometer suggests. In this case, it felt like around 100°C to my body — but the thermometer read only about 80°C.
Tenkou no Yu clearly takes its sauna seriously. There was even a written explanation about the ideal humidity level for a sauna room. They set it at 55%, which is said to be the most gentle on hair and skin. The sauna room itself was dimly lit and perfectly quiet. A large sauna stove radiated a gentle, steady heat. I closed my eyes and settled into a meditative state — and then the auto-löyly kicked in. In an instant, a tremendous wave of heat washed over me. Strangely, the heat was coming from my back. With most auto-löyly systems, you'd expect to feel it on the front of your body. Why the back?
The answer lay in the structure of the sauna room and its blower system. The main sauna at Tenkou no Yu has a domed, circular ceiling. Because of this, the air pushed out by the blower travels along the ceiling and circulates back toward us from behind. That's what was warming my back. A facility this carefully designed — where even airflow circulation is thoughtfully engineered — is incredibly rare. I was already nearing my limit from the löyly, but I found myself murmuring "remarkable" under my breath.
After the main sauna, I slipped into the 16°C cold plunge. The water had that characteristic softness of groundwater. This bath also had jets, which strip away the thin layer of warm water that forms around your skin, making it feel closer to 14°C. I stepped out and made my way to the expansive outdoor relaxation space. Groundwater cold plunge baths really are something else. The refreshing sensation is on a different level entirely. It's like mint water has seeped into every pore — that cool, tingling feeling. Are my pores actually rejoicing? Every time I visit a facility that uses quality water, this happens without fail. In Gifu, I had the same experience with the groundwater at Ogaki Sauna and Megumi no Yu. Absolutely glorious.
For my second set, I headed to the barrel sauna in the outdoor bath area. There are two types: the Danwa Sauna (conversation sauna), designed for chatting with friends, and the Seijaku Sauna Zen (silent sauna), where talking is prohibited. I was genuinely moved by the fact that rather than imposing a one-size-fits-all rule about keeping quiet in saunas, this place has designed a range of experiences to suit different people. Sauna should be free — that's its original spirit. In the old Nordic tradition, people would grill meat and drink in the sauna, chat, read, or simply do whatever they pleased. It was a diverse and free space. At Tenkou no Yu, there's room for those who want to talk and those who want to meditate in solitude — each finding their own ideal time.
Since I prefer quiet time alone, I chose the Seijaku Sauna Zen. And once again, I was surprised by what I found inside. There were partitions — actual dividers — allowing for a completely private sauna experience. Truly zen. Your typical self-löyly sauna doesn't offer anything like this. Sure, you can pour water on the stones yourself, but the room is usually packed, and you're often skin-to-skin with the person next to you or in front of you. Having experienced this firsthand, I can say that a simple partition makes a profound difference to the depth of meditation. Without having to think about the person beside me or worry about space, I could surrender completely to the heat with a clear mind.
Stepping out of the outdoor barrel sauna, I lowered myself into the cold plunge right beside it — set to 14°C, and on the shallower side. Wonderful. At the same moment, a stylish-looking guy who had been sitting across from me in the barrel sauna slid in next to me. "Yesss, that feels amazing!" he called out. His enthusiasm added to my own happiness, and I couldn't help but smile. I found myself thinking: if the world's prime ministers and presidents held their summits right after a sauna and cold plunge, the world might just be a more peaceful place. With that thought drifting through my mind, I wrapped up my sauna session for the day. Tenkou no Yu — absolutely, unequivocally incredible.
After getting out of the bath, it was time to eat. My research beforehand suggested the food at Tenkou no Yu was excellent, and one look at the menu confirmed it — everything sounded delicious, and I wanted to order it all. But I already knew what I was having: the Dry Katsu Curry. Curry pilaf, curry soup, and a tonkatsu cutlet — a golden combination, and it was outstanding.
Today I'd been on the move since morning, found my flow at Wellbe Imaike at lunch, and found it again at Tenkou no Yu in the evening. What an indulgent day. In a single day, I'd managed to visit two of the most iconic facilities in Gifu and Aichi. I have no regrets. All that's left now is to sleep. Rest up properly and get ready for tomorrow. Because tomorrow, another incredible facility is waiting for me.
