Otani Sanso | Luxury Onsen Ryokan in Nagato, Japan

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Hello from the astronomical observatory dome! Information on this month's starry skies

Reach locations throughout Yamaguchi Prefecture at an hour's distance from Otani Sanso by car.

With Nagato Yumoto Onsen as your base, how about a trip through beautiful scenery, caves, and history?

Enjoy a soothing summer onsen trip

The summer months, the perfect for a sightseeing in Nagato Yumoto city, are the time to enjoy bothe onsen and the fresh flavors of the season.

Bountiful nature, seasonal nature
For a day of absolute relaxation

Enter a space in which to unwind in peace,
set at ease in the rich nature and seasonal scenery that surrounds you.

Allow us to treat you to our unmatched hospitality,
and relax completely in the time you spend with us.

Forget the hustle and bustle of the everyday when you immerse yourself in this tranquil space,
and experience the seasons of Yumoto Onsen on your skin, with your tongue, and with your ears.

Rooms

We have prepared rooms in a variety of styles, from Japanese, to those with private outdoor baths, to Western-style--please select a room according to your tastes. Enjoy a room with a different view each time you stay with us: a luxury you can only enjoy at Otani Sanso.

Dining

Experience the seasons of Yumoto Onsen on your skin, with your tongue, and with your ears, as you forget the hustle and bustle of the everyday, and immerse yourself in this tranquil space.

Onsen & Spa Services

Delight in not only the warm hot spring waters of our two types of bath, but also in the landscapes of the seasons as you look out on the rushing waters of the Otozure River. These onsen are open alternately to men and women, so guests are able to enjoy the respective charms of the sounds, light, and views from the variety of baths available in each onsen.

Astronomical Observatory

Explore the Facilities

Lodging Plans

Winter Delights (Tiger Pufferfish Full Course A)

This plan is a winter-only plan, available from October until March of the following year. Enjoy a dinner of Yamaguchi Prefecture's famous tiger pufferfish during its freshest season with this full course.

Guest Rooms with Private Outdoor Baths

Opened on August 1st
Otani Sanso offers a total of 18 guest rooms with natural hot spring outdoor baths. 4 types of scenery, and 8 types of room are available.

Teppanyaki Dinner Course

This popular course allows you to taste both Yamaguchi Prefecture's own Japanese Black wagyu beef steak, and fresh fish.
Enjoy conversation with the chef as you savor each of the many delightful dishes.

See available rooms & book