An astronomical dome on the eighth floor opens to guests most nights.

Otani Sanso is a hot-spring ryokan at Nagato-Yumoto Onsen in Nagato, Yamaguchi, about five minutes by free shuttle bus from Nagato-Yumoto Station. Room types include Japanese-Western rooms of about 43 m² with Simmons twin beds on Ryukyu tatami, Japanese rooms of about 60-84 m² that take up to five guests, Western rooms, and suites with open-air baths. Dinner is a monthly-changing kaiseki of seasonal Nagato produce, or teppanyaki and yakitori courses, served in the inn's dining venues, and breakfast is a buffet with bread baked in-house. Children's kaiseki and kids' plates are available at extra cost, and the inn recommends its Japanese rooms for families and groups.

Otani Sanso

大谷山荘

Rate

From US$167 per person

From US$334 for 2 guests (1 room)

Per person, per night, with dinner and breakfast. Quoted by the property or its booking pages; taxes and the bathing levy may sit outside it. Shown in US dollars, converted from the yen the property quotes at the Oct 7, 2026 reference rate; the booking site charges at its own rate.

Dates and guests

Your selection is carried into supported booking sites so you can compare the same stay.

Check-inCheck-out

AdultsChildren

Agoda Expedia

The stay

Private bath: Some rooms only — the room type decides

Practical details

From the property’s or its operator’s official website. Only what the site states is shown.

Getting there: About 5 min by free microbus from JR Nagato-Yumoto Station / bus stop (reservation required per The Ryokan Collection); shared jumbo taxi from JR Shin-Yamaguchi Station about 1 hr 5 min (4 runs a day, 3,000 yen); highway bus from Hakata about 3 hr 5 min; Source: otanisanso.co.jp (opens in a new tab) · Checked Oct 8, 2026
Nearest station: Nagato-Yumoto Station (JR Mine Line); Source: otanisanso.co.jp (opens in a new tab) · Checked Oct 8, 2026
Check-in: 15:00-19:30 (last dinner start 19:30); Source: otanisanso.co.jp (opens in a new tab) · Checked Oct 8, 2026
Check-out: 11:00 (extension to 12:00 available for a fee of 20% of the room rate per hour); Source: otanisanso.co.jp (opens in a new tab) · Checked Oct 8, 2026
Room capacity: Up to 5 in the Japanese-style rooms; Source: otanisanso.co.jp (opens in a new tab) · Checked Oct 8, 2026
Children: Children welcome; children's kaiseki for elementary-school children and a kids' plate for ages 3-6 at extra cost; child-size samue (90-150 cm) provided; Source: otanisanso.co.jp (opens in a new tab) · Checked Oct 8, 2026
Dinner: Monthly-changing seasonal kaiseki of Nagato produce, or special kaiseki, teppanyaki or yakitori courses, served in one of the dining venues (Restaurant Fuko, main dining Zuiun or the Akebono ryotei rooms); not in-room; Source: otanisanso.co.jp (opens in a new tab) · Checked Oct 8, 2026
Breakfast: Buffet of 50+ Japanese and Western dishes centred on Yamaguchi produce, with bread baked in-house and eggs cooked to order (may be a Japanese set meal depending on circumstances); Source: otanisanso.co.jp (opens in a new tab) · Checked Oct 8, 2026

Tattoos, special diets, accessibility and solo stays: see “Before you book: what the property officially says” below.

Before you book: what the property officially says

Answers taken from the property’s or its operator’s official website, with the exact wording. We only show what the site states.

Tattoos

Not clearly stated on the official site — ask the property before booking.

Dietary needs

Not clearly stated on the official site — ask the property before booking.

Accessibility

Step-free guest room: Partly — Show the property’s wording
デラックスツインはバリアフリー対応客室です（車イスでの入室、洗面利用可）。
The property’s own words · Source: otanisanso.co.jp (opens in a new tab) · Checked Sep 29, 2026

Step-free entrance, Accessible toilet, Accessible bath: not clearly stated on the official site — ask the property before booking.

Travelling solo

Not clearly stated on the official site — ask the property before booking.

Against the 179

Size: 98 rooms— In the largest quarter of the 179, which run 1 to 508
Award: The Ryokan Collection— 46 of 179
Type: Ryokan— 59 of 179
Where: Yamaguchi— 2 of 179

The catalogue’s own axis

3 Keys7 stays
2 Keys23 stays
1 Key113 stays
Relais & Châteaux15 stays
The Ryokan Collection46 stays

The Ryokan Collection — 46 of the 179 stays here.

For scale: the smallest stay in this catalogue is Hakone Kairai at 1 room, the largest The Okura Tokyo at 508.

Nearby

Senjojiki

≈ 13 km away · Plateau

Motonosumi Inari Shrine

≈ 15 km away · Shrine

Ryugu no Shiofuki

≈ 15 km away · Coast

Omijima

Island

Nagato Yumoto Onsen

Onsen

Tiered rice paddies of Higashiushirobata descending toward the sea

Higashiushirobata Rice Terraces

Terraces

Distances are in a straight line from this property, not travel times. Locations from OpenStreetMap · © OpenStreetMap contributors (ODbL)

Photos: © Tzu-hsun Hsu (CC BY-SA 4.0) · © yuki5287 (CC BY 2.0) · © Raita Futo (CC BY 2.0) · © Totti (CC BY-SA 4.0)

About the ratings

RYOKAN

The Ryokan Collection

A small membership of established Japanese ryokan recognised for the traditional inn experience.

Good to know

Are meals included in the rate?

The rate shown is per person and includes dinner and breakfast.

How many rooms does Otani Sanso have?

Otani Sanso has 98 rooms.

How do you get to Otani Sanso?

About 5 min by free microbus from JR Nagato-Yumoto Station / bus stop (reservation required per The Ryokan Collection); shared jumbo taxi from JR Shin-Yamaguchi Station about 1 hr 5 min (4 runs a day, 3,000 yen); highway bus from Hakata about 3 hr 5 min

What is the nearest station to Otani Sanso?

Nagato-Yumoto Station (JR Mine Line)

What time is check-in at Otani Sanso?

15:00-19:30 (last dinner start 19:30)

What time is check-out at Otani Sanso?

11:00 (extension to 12:00 available for a fee of 20% of the room rate per hour)

How many guests can stay in one room at Otani Sanso?

Up to 5 in the Japanese-style rooms

What is the policy on children at Otani Sanso?

Children welcome; children's kaiseki for elementary-school children and a kids' plate for ages 3-6 at extra cost; child-size samue (90-150 cm) provided

What are the dinner arrangements at Otani Sanso?

Monthly-changing seasonal kaiseki of Nagato produce, or special kaiseki, teppanyaki or yakitori courses, served in one of the dining venues (Restaurant Fuko, main dining Zuiun or the Akebono ryotei rooms); not in-room

What are the breakfast arrangements at Otani Sanso?

Buffet of 50+ Japanese and Western dishes centred on Yamaguchi produce, with bread baked in-house and eggs cooked to order (may be a Japanese set meal depending on circumstances)

How do I book Otani Sanso?

Use the booking links near the top of this page. Prices and cancellation terms differ between sellers, so it is worth comparing more than one.