Osawa Onsen: Riverside Baths & Nearby Hotels

Osawa is a hot-spring inn complex in Hanamaki’s western valley. Spend a long afternoon at its river baths. Day admission covers Tojiya and Sansuikaku.

The spring and its history

Osawa’s alkaline simple spring emerges at 51.3°C with a pH of 9.0. The inn complex stands at 181 Osawa, Yuguchi. Miyazawa Kenji returned here repeatedly. The poet and sculptor Takamura Kotaro praised Osawa’s water during his seven years in Hanamaki.

The Kenji sites at Takamatsu are near Shin-Hanamaki, a road journey from Osawa. At Takamura’s museum, you can see his sculpture Hand and Chieko’s paper pictures. His small cottage stands on the same grounds, protected by an enclosing building and a later steel-frame structure.

Toujiya at Osawa Onsen in Hanamaki. — Tojiya at Osawa Onsen. · Photo: 掬茶

The river and indoor baths

At Osawa-no-Yu, you bathe outdoors beside the flowing river. Men and women share this pool outside the women-only hour. The women-only Kawabe no Yu is also right beside the river. Kawabe no Yu may close during severe winter cold.

Bath / service	Hours or fee	Conditions
Osawa-no-Yu women-only hour	20:00–21:00	Suspended during the summer horsefly season
Tojiya day-bath reception	07:00–20:30	Finish bathing by 21:00
Adult day admission	¥700 (about US$4.50)	Tojiya and Sansuikaku baths
Child day admission	¥400 (about US$2.50)	Tojiya and Sansuikaku baths

Inside, spring water flows directly into Yakushi no Yu’s tile-lined pools for men and women. You must get dressed to move between Yakushi no Yu and Kawabe no Yu. At Sansuikaku, men and women have separate semi-outdoor baths at Toyosawa no Yu.

Some baths may close for cleaning, and staff may limit admission when the baths are full. Visitors with tattoos are refused admission. At nearby Namari, you bathe standing in a natural-rock pool. The Yumoto hotel baths are on a different bus route.

Getting to Osawa

Public buses for day visitors

The Yuguchi Line leaves Hanamaki Station’s public-bus stop 3. Buses pass Shidotaira and Osawa before continuing to Namari and Shin-Namari. The operator’s current timetable is effective October 1, 2025. The weekday and weekend/public-holiday runs below have different times. All times are Japan Standard Time.

Run	Departure	Arrival
Weekday arrival example	Hanamaki Station stop 3, 14:10	Osawa, 14:35
Weekend / public-holiday arrival example	Hanamaki Station stop 3, 13:00	Osawa, 13:25
Weekday last return: full route	Shin-Namari terminus, 18:45	Hanamaki Station stop 5, 19:18
Weekday last return: board at Osawa	Osawa, 18:52	Hanamaki Station stop 5, 19:18
Weekend / public-holiday last return: full route	Shin-Namari terminus, 16:30	Hanamaki Station stop 5, 17:04
Weekend / public-holiday last return: board at Osawa	Osawa, 16:37	Hanamaki Station stop 5, 17:04

The last public bus leaves Osawa before the evening women-only hour. For that session, stay overnight or return by car or taxi.

Station shuttles for overnight guests

Reserve Osawa’s station shuttle when booking or at least four days before arrival. At Shin-Hanamaki Station, board at west exit stop 2. The ride from Shin-Hanamaki to Osawa takes 45 minutes.

Run	First departure	Second departure	Arrival
Afternoon shuttle	Shin-Hanamaki 15:10	Hanamaki 15:25	Osawa 15:55
Afternoon shuttle	Shin-Hanamaki 16:10	Hanamaki 16:25	Osawa 16:55
Afternoon shuttle	Shin-Hanamaki 17:10	Hanamaki 17:25	Osawa 17:55

Since September 1, 2026, passengers aged three and over pay ¥100 (about US$0.60) each way, at checkout. Reserve the return journey by 20:00 the previous night.

Run / eligible guests	Departure	First arrival	Final arrival
Shared return for Osawa overnight guests	Osawa 09:57	Hanamaki 10:35	Shin-Hanamaki 10:50
Later return: Sansuikaku overnight guests only	Osawa 10:50	Hanamaki 11:15	Shin-Hanamaki 11:30

Tojiya, Sansuikaku and nearby stays

Tojiya’s building is roughly 200 years old. Guests stay in traditional rooms and can cook in a shared kitchen. Tojiya is a toji inn, where guests come for longer bathing stays. Alongside Tojiya, Sansuikaku has Japanese-style ryokan rooms in a modern building beside the baths. Kikusuikan now houses Chigaya Gallery, which closes in winter.

Farther down the valley, Hotel Shidotaira has a 25-meter indoor bath with a stream view. The traditional rooms at Yukaen in Yamanokami have coffered ceilings, crafted sliding screens and transoms. At Yusen Shidate, all 26 rooms have a private open-air hot-spring bath. Yusen Shidate admits guests aged 12 and over. Its communal baths include garden, hiba-wood and granite tubs.