Tonosawa Onsen was discovered in 1605 by a wood-eating monk named Danshoku Shonin, and has prospered as one of the seven hot springs in Hakone since the Edo period (1603-1868), healing many travelers with its abundant, clear and colorless water.
At our inn, the private spring "Tonosawa no Yu", which is pumped up from 300 meters below ground on the premises, is poured into the baths of the four baths and the guest room open-air bath, including the elegant open-air bath.

Iwato no Notenburo

Features

This is an open-air bath where you can enjoy the hot spring water of the source while gazing at the mountains of the four seasons.
The large rocks towering over the bathtub are said to have existed since ancient times, when Owakudani began erupting, and have been standing on this hill since the establishment of the inn.

Usage time

15:00 - 21:00 (men only) / 21:00 - 24:00 (women only)
6:00 - 9:30 (for men only)

Usage fee

It is available free of charge.

Keikoku no Notenburo

Features

This open-air bath overlooks the Hayakawa Valley, and the sound of the murmuring stream heals you.
Feel the seasonal breeze blowing through the mountains as you enjoy the warmth of the spring water pouring from the hot spring.

Usage time

15:00 - 24:00 (private, 45 minutes per couple, reservation required)
6:00 - 9:30 (for women only) *Reservations must be made in the order of arrival on the day.Please note that this service may not be available depending on your arrival time.

Usage fee

It is available free of charge.

Kajika no Yu

Features

The inn's largest bathtub is filled with hot water from the source.
The bathroom is decorated with wood and stone in a calm color palette, accented with a modern shaped waterfall and mosaic tiles.

Usage time

15:00 - 21:00 (women only) / 21:00 - 24:00 (men only)
6:00 - 9:30 (for women only)

Usage fee

It is available free of charge.

Take no Yu

Features

The inn's largest bathtub is filled with hot water from the source.
The bathroom is decorated with wood and stone in a calm color palette, accented with a modern shaped waterfall and mosaic tiles.
Take no Yu
The "Bamboo Hot Spring," a building dedicated to outdoor hot spring baths, is located in the bamboo grove behind the inn and is the symbolic hot spring bath of the inn.
The "Usagi" (above) is a neatly shaped stone bathtub with a stream of water cascading onto one's back, and the "Tsuki" (below) is a curved stone bathtub with built-in lighting.
There are two open-air baths that change their expression from day to night.

Usage time

15:00 - 21:00 (women only) / 21:00 - 24:00 (men only)
6:00 - 9:30 (for men only)

Usage fee

It is available free of charge.