Izu Nagaoka Onsen Sanyo-so: 'Tsukimidai' Restored to Showcase the Charm of Japanese Culture

Izu Nagaoka Onsen Sanyo-so (Location: 270 Azenoue, Izunokuni City, Shizuoka Prefecture; General Manager: Masahiro Yoshiura) will restore the 'Tsukimidai' (moon-viewing platform) in its new building from Wednesday, May 13, 2026. The Tsukimidai, traditionally established for appreciating the moon within Japan's ancient 'Kangetsu' (moon-viewing) culture, will offer guests a unique stay experience to enjoy the moon alongside the seasonal beauty of the Japanese garden, allowing them to savor the 'Omomuki' (profound aesthetic charm) of Japan. This service is announced as one of the 'Prince Signature Experience' series (described later) that Seibu Prince Hotels & Resorts will be rolling out.

Tsukimidai

In Japan, the culture of 'Kangetsu,' or moon appreciation, has been cherished since ancient times. Spreading through court culture from the Nara to Heian periods, the moon has been passed down as a symbol of Japanese aesthetic sensibility and seasonal awareness, with people composing Waka poems while gazing at it.

The new building of Sanyo-so, where the Tsukimidai is being restored, was designed by architect Togo Murano, with the beauty of Japanese architecture harmonizing with the garden evident throughout. By restoring the Tsukimidai in this space, a unique setting is created where guests can view the moon amidst the tranquil garden scenery.

Tsukimidai

At Sanyo-so, while valuing the charm of the space created by its historic architecture and garden, we are committed to preserving and promoting the value of Japanese traditional culture by offering stay experiences that allow guests to feel the beauty and allure of Japanese culture.

What is Tsukimidai?

Tsukimidai is a space traditionally established for appreciating the moon within Japan's ancient moon-viewing culture. Often located overlooking gardens or ponds, it has been cherished as a uniquely Japanese culture for spending quiet time enjoying the moon with nature. At the time of its opening, Sanyo-so had a Tsukimidai in this very location overlooking the Japanese garden, but its presence was lost over time. This time, based on the original design and philosophy from its founding, the Tsukimidai has been restored. It revives the charm of yesteryear in the modern age and provides a space where guests can once again enjoy a serene moment woven by the moon and the garden.

Night Tsukimidai

How to Enjoy Izu Nagaoka Onsen Sanyo-so 'Tsukimidai' Seasonally

Spring – Tea ceremony enjoyed while listening to the sounds of nature

Summer – Music evening enjoyed with the moonlight

Autumn – Moon-viewing party to admire the harvest moon

Winter – Kotatsu bar under the starry sky

Tea ceremony image, Jazz image

<Available to external guests> 'Tsukimidai' Experience Overview

① Tea Ceremony

A standing-style tea service will be held at Tsukimidai.

Dates: Irregularly from June

Time: 12:00 NOON. – 2:00 P.M.

Price: ¥2,500

Capacity: 15 people

② Tsukimidai Jazz Event

After dinner, a jazz night event will be held at Tsukimidai.

Date: Friday, July 10, 2026

Time: 5:30 P.M. – 8:00 P.M.

Price: ¥32,000 (includes dinner, jazz appreciation, consumption tax, and service charge)

Content: Dinner and jazz appreciation at Tsukimidai

*In case of rain, the event will be held indoors.

*Contents may be subject to change.

About the 'Prince Signature Experience' Series by Seibu Prince Hotels & Resorts

Our company aims to grow into a 'global hotel chain originating from Japan,' and with the theme of 'creating experiences that stir the five senses,' we are committed to creating 'the joy of memorable journeys.' We have named the iconic experiential value that can be enjoyed at any time of the year, serving as the 'face' of each of our hotels, ski resorts, and golf courses nationwide, as the 'Prince Signature Experience.' We will begin announcing and offering these sequentially over several years starting from April 2026.

Starting with 'Dog-friendly rounds' at Hareyama Golf Course and 'Tsukimidai' at Sanyo-so, we will expand services unique to each facility and season, offering 'special experiences that can only be enjoyed here' and 'experiences that meet diversifying demands,' embodying the unique individuality and charm of each facility. Through this, the hotel stay itself will become the purpose of the trip, deepening our 'differentiation' as a global hotel chain chosen by domestic and international guests, and aiming to establish a brand loved worldwide.

Izu Nagaoka Onsen Sanyo-so Overview

Built as a villa for Hisaya Iwasaki, the eldest son of Yataro Iwasaki, founder of the former Mitsubishi Zaibatsu, amidst a magnificent Japanese garden. The main building, a historic and prestigious Sukiya-zukuri style, is registered as a tangible cultural property, a valuable national asset. The new building was designed by Togo Murano, a recipient of the Order of Culture and an architect. The beautiful garden, with its changing seasons, spans approximately 3,000 tsubo. A magnificent Japanese garden by Kyoto gardener Jihei Ogawa, a pioneer of modern Japanese gardens, spreads out.

Location: 270 Azenoue, Izunokuni City, Shizuoka Prefecture

Opened: October 1947

Contact: TEL 055-947-1111

Access: By train.

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