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Onogawa Onsen Azumaso

小野川温泉 吾妻荘おのがわおんせん あずまそう

A hillside ryokan with kakenagashi hot-spring baths in Onogawa Onsen

Mark it and it goes on your passport, with 20 drops. What's the passport?

Can I go?

Day visit · 日帰り (ひがえり)Day-use visit without overnight stay. Not always available at ryokan and hotels, so check in advance.More in the glossary
Yes
14:30–18:00

Depending on the number of guests, opening hours may be shortened

¥600

Adults pay 600 yen for day-use bathing; children age 1 and up pay 400 yen.

Private bathYesto book (貸切 (かしきり)Private or family bath you have to yourselves for a set time, often for an extra fee. Some are booked ahead and some are first come, first served, and not every place opens them to day visitors.More in the glossary)

About

Azumaso is a ryokan on a hillside above Onogawa Onsen, near Yonezawa, with kakenagashi (掛け流し) hot-spring water. The main indoor bath sits behind large windows that look onto a garden through the seasons, and the tub is built on the deep side for a proper soak. Guests can also reserve a private bath, and two of the room types each have their own onsen tub: the Azuma rooms a semi-open-air one, the other type an indoor one. A footbath sits in the courtyard, and day bathers are welcome too. The inn has been taking in bathers since 1789, when Onogawa was a toji (湯治) retreat, and it still has a homely, unhurried feel. Rooms look out over either the Azuma mountains or the onsen town below.

The baths

Special here

  • MountainsMountains and ridges around you as you soak.

Baths and water

  • Yes
    OnsenUses natural hot spring water
  • Yes
    Indoor Bath内湯 (うちゆ)Indoor bath located within the facility building, providing year-round comfort regardless of weather.More in the glossary. Enclosed indoor bathing area
  • No
    Mixed BathingShared bathing area for all genders
  • No
    Day-Use Private Bath貸切 (かしきり)Private or family bath you have to yourselves for a set time, often for an extra fee. Some are booked ahead and some are first come, first served, and not every place opens them to day visitors.More in the glossary. Day visitors can book the private bath, not only overnight guests

Not known yet: Outdoor Bath, Sauna, Cold Bath, Room Onsen, Tattoo, Kids, Dining, Washing, Towels, and Parking. Been there? Tell us.

Documents1

The water analysis certificate (温泉分析書 (おんせんぶんせきしょ)Official water analysis certificate for the onsen, documenting its mineral composition, temperature, and classification. Usually displayed at the entrance to the bathing area.More in the glossary) and other papers, as photographed.

Programs1

  • Yamagata Onsen-do

    A prefecture-wide onsen stamp rally across 86 baths in Yamagata, launched in 2026. Collect stamps in all four areas, Murayama, Mogami, Shonai and Okitama, and climb the ranks toward Onsen Master.

    Area
    Okitama
    No.
    75
    View program

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Last updated October 13, 2026

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