7 Facilities
The oldest inn in the Nyuto Onsen area, a hidden hot spring dating to the Edo period. The thatched 'Honjin' building and the large milky-white mixed rotenburo are its iconic scene. Day bathing 10:00–15:00; on Mondays the rotenburo is closed for cleaning and only indoor baths are open. Rooms sell out months ahead. From Tazawako Station take the bus, then the inn shuttle from Alpa Komakusa.
The innermost of Nyūtō's seven baths — a cluster of thatched bath huts. Two separate sources feed a mixed open-air pool and gender-separated indoor/outdoor baths of milky sulfur water. Day use 9 am–4 pm, the longest window of the seven; closed mid-November to mid-April.
The most polished of the seven Nyūtō inns, beside the Sendatsu stream and popular with women. Two sources — rusty 'gold' and clear 'silver' — in open-air baths above the rushing river. Day-use reception is short (10:30 am–2 pm), so come early.
A single inn at the end of the Nyūtō bus line, wrapped in old-growth beech forest and named for the river crabs once abundant in the nearby stream. Unusually for Nyūtō, the water is clear and colourless — a bicarbonate spring with drifting white flakes and a gentle feel. The signature is Karako-no-yu, a mixed open-air pool some 50 m from the building in the woods, magical in snow season; there are also separate indoor wooden and rock baths. Day use 9:00–16:30, ¥800. Covered by the Yumeguri-chō pass (¥2,500, valid one year) for all seven Nyūtō inns — the classic combo is with Tsuru-no-yu and Taenoyu. About 50 minutes by bus from Tazawako Station to the Nyūtō Onsen stop.
One of the seven baths of the Nyuto Onsen village in Semboku, Akita, a secret spa known as the mountain's medicinal bath. After closing for renovation from 2023, it was reborn as Magoroku Onsen Rokuan, resuming day bathing in February 2025 and lodging that April. Lodging and bath houses stand apart in a rustic layout; of its four sources, the indoor Ishi-no-Yu and Karako-no-Yu are waku-to baths where water wells up through the tub floor. A simple sulfur spring (Ishi-no-Yu, 51.6°C) and a simple spring (Karako-no-Yu, 49.9°C) flow free - faintly green clear water and milky-white water alike. Besides separate indoor and open-air baths there are mixed-bathing indoor, open-air and sauna baths (said to be among Nyuto's easier mixed baths). Day bathing runs roughly 10:00-15:00 in two tiers: 700 yen for the indoor baths only, 3,000 yen for all baths. A bath-hopping booklet covering Tsurunoyu and Kuroyu can also be used.
One of the lodges of the Nyuto Onsen village in Semboku, Akita, uniquely housed in a relocated wooden school building. Hallways and stairs from its school days remain inside, giving it a nostalgic air beloved by secret-onsen fans. The green-tinged water - an acidic, bitter-tasting spring known as the wound bath and skin bath - flows free from the source, and there is an open-air bath usable even in winter. Beside the entrance stands the only footbath in Nyuto (roughly April to October). Day bathing runs 9:00-16:30 at 600 yen for adults (300 yen under junior high), and the Nyuto bath-hopping booklet is accepted. About 45-50 minutes by the Ugo Kotsu Nyuto-line bus from JR Tazawako Station, one minute from the Nyuto Onsen stop - a perfect base for touring all seven baths alongside Tsurunoyu, Kuroyu and Magoroku. Note that lodging is currently suspended; only day bathing is available.
The most modern, resort-style lodge among the secret baths of Nyuto Onsenkyo, in Semboku, Akita. Its signature is two spring sources under one roof: indoors you soak in free-flowing Nyuto-no-Yu (sodium bicarbonate) and Tazawako Kogen-no-Yu (simple sulfur), while the open-air bath runs Nyuto-no-Yu. With source temperatures of 70°C indoors and 44.5°C outdoors, you can choose the soak that suits you. Uniquely among the seven Nyuto baths it sits outside the bath-hopping booklet scheme, which also makes it the easiest for day visitors: 11:00-15:00 (last entry, leave by 15:30), 800 yen for adults and 400 yen for ages 4 to elementary. About 45 minutes by Ugo Kotsu bus from JR Tazawako Station, right at the Kyukamura-mae stop. A handy base for climbing Mt. Komagatake or viewing snow monsters, with snowshoe tours in winter.