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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

Lodging
Tohoku·Yamagata

Day Use

Yes
¥600

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

Bathing & Water

Natural onsen water

Uses natural hot spring water

Indoor BathYes

Enclosed indoor bathing area

Bathing Arrangements

Private BathYes

A private bath you can reserve for yourself or your group

Day-Use Private BathNo

Day visitors can book the private bath, not only overnight guests

Mixed BathingNo

Shared bathing area for all genders

Views

Mountains

Programs

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.

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Last updated September 26, 2026