A hot spring that becomes a reason to stay overnight.

Shinyu Onsen – A Rare Hot Spring Reserved for Those Who Stay

Known among locals in Shuzenji, yet it does not appear clearly on Google Maps and is rarely described in tourist guidebooks.
It's,,,,, Shinyu .

Even though you know this name "Shinyu",
Access is limited to...local association members and a small number of guests staying nearby..
This exclusivity is not about luxury — it exists to preserve the onsen itself.

About Shinyu Onsen

Shinyu is one of the very few onsen in Shuzenji that remains..100% free-flowing natural hot spring water, with absolutely no added water .

The special here is
・Guests turn the hot spring source themselves.
・No water is added.
・The temperature is adjusted according to one’s physical condition and mood on that day.

This kind of bathing style, which can hardly be experienced today, has been preserved here.

Rather than bathing in a prepared hot spring,it feels like welcoming the hot water by oneself..
This entire sequence of actions itself is the experience of Shinyu.

This is exactly why Shinyu is considered a highly valuable hot spring, rarely found even when looking across the entire Japan.

The Rarity of This Hot Spring

Even when looking at the entire Shuzenji Onsen area,
・Completely free-flowing natural hot spring water
・No added water
・Limited access for users
there are almost no hot springs that satisfy all of the following conditions:

Because of this cultural value,
it has been featured in Suruga Bank’s hot spring series and interviewed in Yahoo! News expert articles.
▶︎Suruga Bank feature:https://onsen.surugabank.co.jp/nakaizu/251010.html
▶︎ Yahoo! News expert article:https://news.yahoo.co.jp/expert/articles/d4be41916e03b213995b2a292a96f08fdb782ec4

What is being valued is not the facilities,
but the hot spring culture itself 　that remains as part of everyday life.

Why Hot Spring Enthusiasts Praise It

From hot spring lovers who have actually visited, many comments can be heard such as:
“The way the heat rises is different,”
“It feels like it reaches deep into the body.”
and so on.

On the other hand, for guests from overseas, there is a completely different kind of value.
Being able to experience their first hot spring not at a tourist facility,but in the same bath as local people, while having conversations..

Being taught how to bathe and sharing casual conversations.
This is not “tourism,” but time spent touching the everyday life of Shuzenji..

The Meaning of Staying at Hostel Knot

Shinyu is located just a few dozen seconds on foot from Hostel Knot.
It is not a place you need to prepare for and head out to,
but a distance where you can say, “Shall we go for a quick bath now?”

Because of this sense of distance,
you can naturally enter Shinyu before going out to eat, or after strolling around the town.

There are people who come to stay because this hot spring exists.
At Hostel Knot, we hope many people will be able to experience such a hot spring.