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Sanyo-so stands by the quiet mountainside of Izu Nagaoka, which has prospered as a hot spring resort since the Kamakura Era. On the vast and nature-rich plot of land, visitors can enjoy the natural beauty of the four seasons in the garden full of elegant waterfalls and streams.

Sanyo-so was a simple but elegant Sukiya style Japanese residence in a grand Japanese garden built in 1929 as the second home of Hisaya, the eldest son of Yataro Iwasaki, the founder of the former Mitsubishi zaibatsu family-run conglomerate by the work of the garden designer, Jibe Ogawa in Kyoto.

Stay with us and enjoy the traditional Japanese rooms and garden, the relaxing hot spring, and traditional Japanese cuisine.

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Oimatsu

Oimatsu

This space was used as a guest room by the Iwasaki family. Visitors can relax in this spacious…

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Miyuki

Miyuki

This room, built in 1957, is located in the very back — about 300 meters away from the entrance…

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Kiso

Kiso

This room, built in 1929, is a standard type in the main buildings.

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Matsukaze

Matsukaze

This room was used as Hisaya Iwasaki’s own living room when the Iwasaki family still lived at…

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Kogou

Kogou

This room was used as Hisaya Iwasaki’s own living room when the Iwasaki family still lived at…

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JBA

JBA

Area:Main room 10 tatami mats/ adjoining room 6 tatami mats
Bed size: —

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JCA

JCA

Area:Main room 10 tatami mats/ adjoining room 6 tatami mats
Bed size: —

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TBA

TBA

Area:Main bedroom 10 tatami mats / bedroom 15.5m2
Bed size: 1,100 x 2,100mm

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TDA

TDA

Area:Living room 53.5m2 / bedroom 15.9m2
Bed size: 1,100 x 2,100mm

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Garden

Sanyo-so belongs to the Izu Nagaoka hot springs, Kona district, the origins of the Minamoto clan, and is located by the…

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Communal Bathhouse

Communal bathhouse: Men 1, Women 1

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Lounge

The first thing that grabs the attention of Sanyo-so visitors is the round building on the left. Like the new buildings,…

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