Nyuto Onsen sits deep inside Towada-Hachimantai National Park in Akita Prefecture, in northern Japan (Tohoku). It is one of the region’s most celebrated hidden onsen — secret hot springs buried deep in the mountains — and is often ranked among the top three in all of Japan. Seven distinctive ryokan (traditional inns) are scattered across the valley, and six of them still preserve Japan’s old tradition of mixed-gender bathing (konyoku). From Tokyo it is about three hours on the Akita Shinkansen — a deep-mountain onsen trip that is well within reach for foreign travelers. I have been twice, once during the autumn foliage season and once in deep snow; the place was strikingly different in each season, and each time unforgettable.
Getting to Nyuto Onsen
Nyuto Onsen lies at the foot of Mt. Nyuto, near Lake Tazawa, the old samurai town of Kakunodate, and the Akita Nairiku Line. If you are not driving, the easiest route is to take the Akita Shinkansen to Tazawako Station and transfer there to the Ugo Kotsu bus (Nyuto Line): roughly one bus an hour, about a 50-minute ride, ¥840 one way, dropping you right into the hot-spring village. The bus stops along the way at ryokan such as Taenoyu and terminates at Ganiba Onsen. Note that the ryokan generally offer no pickup service and buses are infrequent, so plan your arrival and departure around the bus timetable.
A few things to watch for in winter: some ryokan (such as Kuroyu Onsen) close for the season, and the Magoroku–Kuroyu area, which sits deeper in and is reached on foot along a forest path, is hard going in the snow. There is also a lesser-known route — a reservation-only shared taxi from Matsuba Station on the Akita Nairiku Line — that cuts about 1.5 hours off the trip, though it costs more, so in winter be sure to arrange it ahead of time.
Seven Ryokan — Which to Choose: Tsuru-no-yu vs. Taenoyu
Although the village has seven ryokan, most travelers really choose between two: Tsuru-no-yu and Taenoyu. Tsuru-no-yu is the most famous, and its signature is the honjin — a thatched main building more than 300 years old. Its appeal lies in the atmosphere of an old, secluded onsen, but the honjin is extremely hard to book: reservations are by phone only, and without booking half a year ahead it is nearly impossible to get in. Taenoyu is the most expensive ryokan in the village, offering not just that hidden-onsen feeling but a refined Japanese hot-spring experience. It is just as sought-after, but with one advantage — you can book it through sites like Jalan. This winter it showed as fully booked at first; then, a week before departure, a single room suddenly opened up on Jalan, which made this last-minute trip possible.
The other four onsen — Ganiba, Ogama, Magoroku, and Kuroyu — each have their own character. Some sit right by the road; others require a walk down an unpaved access road deeper into the mountains. They are generally more rustic and harder to reach. If what you are after is the raw feel of a true hidden onsen, they are worth exploring; if you want the secluded atmosphere without giving up comfort, Taenoyu is the most balanced choice.
Staying at Taenoyu
Taenoyu is a classic Japanese onsen ryokan: a modest wooden building built around three things — service, food, and the baths. My first visit was in autumn, with the hills ablaze in red maple; this time I returned in the white of deep winter. Seven years apart, the mood was very different. In 2012 the place still felt like a hidden retreat; by 2019 it was nearly full, with about two-thirds of the guests being Chinese-speaking travelers. The service was as polished as ever — just a little more by-the-book than it once was.
Small and Refined
Taenoyu’s appeal comes from keeping top-tier quality and service inside a wild, hidden-onsen setting — put simply, a night here is a treat in itself. The inn is small: step through the door and there is a little wood stove and a compact front desk, so on a winter’s day you feel the warmth the moment you come in from the cold (the one downside is that check-in and check-out can feel cramped when a group arrives at once). The interior is tastefully done, each of the two dining rooms has its own distinctive design, and guests are split between them for breakfast and dinner.
Half-Board Dining (Ippaku-nishoku)
Most Japanese onsen ryokan include half-board (ippaku-nishoku) — dinner and next-morning breakfast — and the meals are central to the experience. Strictly speaking, Taenoyu’s dinner does not use many luxury ingredients, but everything from the tableware to the plating to the pacing of the courses is meticulous; the overall impression is one of refinement. One standout is a local grilled fish. In 2012 they even brought the whole fish out to show guests before serving it; this time that was swapped for local vegetables presented in a mound of snow. Even the children’s option is a meal designed especially for children rather than a shrunken adult portion — a perfect example of Japanese attention to detail.
Rooms: Just Book the Cheapest One
Taenoyu’s rooms are all small, each with its own bathroom. Across my two stays I happened to book both the lowest and highest room types: in 2012, the cheapest two-person room ran about ¥30,000; in 2019, only the most expensive stream-side room was left (¥47,000 for two adults and one child). Honestly, there is not much difference between them. The priciest room is slightly larger, with a small table and chairs by the window and one big floor-to-ceiling window, but the furnishings are much the same. While you are at dinner, staff lay out your futon, and either way you sleep comfortably. If, like me, you are watching the budget, just book the cheapest room — though Taenoyu is so popular that the room type is not always yours to choose.
The Baths and Mixed-Bathing Culture
Inside, Taenoyu is refined, but the baths deliberately keep a rustic, old-world feel. There are seven pools, including the “golden” and “silver” baths, and the men’s and women’s sides switch after midnight. My favorite, though, is the outermost open-air mixed bath. It melts into the surrounding nature — soaking there quietly, taking in the autumn maples or the snow, feels like a gift from nature.
For foreign visitors, mixed bathing (konyoku) deserves a word of explanation: it is an old Japanese custom in which men and women bathe together, unclothed, in the same pool. Today you mostly find it at the most scenic and historic onsen ryokan. In fact, at any inn that still keeps a mixed bath, that pool is usually the one with the best view and the one most worth soaking in. Whether you feel comfortable with it is entirely personal; if you are shy, Taenoyu also has a reservable kashikiri-buro (a private bath you book for yourselves) right next to the mixed bath — though the view is not quite as good.
