A serene outdoor Japanese hot spring (onsen) with a rock-lined pool of water, set under a traditional wooden pavilion with exposed beams. A small wooden spout pours water into the pool, which is surrounded by lush green plants and a stone wall.

The Source of Serenity

Immerse yourself in the restorative embrace of Mt. Fuji’s volcanic waters.
A timeless ritual of healing, refined for the modern global traveler.

A serene outdoor Japanese hot spring (onsen) with a rock-lined pool of water, set under a traditional wooden pavilion with exposed beams. A small wooden spout pours water into the pool, which is surrounded by lush green plants and a stone wall.

The Source of Serenity

Immerse yourself in the restorative embrace of Mt. Fuji’s volcanic waters.
A timeless ritual of healing, refined for the modern global traveler.

Ancient Earth, Modern Healing

Ancient Earth, Modern Healing

Sourced from 1,500 meters beneath the earth’s crust, our water emerges naturally enriched with volcanic minerals.

We practice the traditional Kakenagashi style—a continuous flow of fresh, mineral-rich water that never recirculates, ensuring the highest level of purity and thermal benefits for your skin and soul.

Sourced from 1,500 meters beneath the earth’s crust, our water emerges naturally enriched with volcanic minerals.

We practice the traditional Kakenagashi style—a continuous flow of fresh, mineral-rich water that never recirculates, ensuring the highest level of purity and thermal benefits for your skin and soul.

Two families enjoy a relaxing foot bath (ashiyu) on a wooden deck that overlooks a large pond filled with colorful koi fish.
An energetic indoor performance by Japanese taiko drummers, their arms a blur of motion as they powerfully strike a massive ōdaiko drum with wooden sticks in front of an audience. In the background, a row of lit paper lanterns hangs from the ceiling.
An energetic indoor performance by Japanese taiko drummers, their arms a blur of motion as they powerfully strike a massive ōdaiko drum with wooden sticks in front of an audience. In the background, a row of lit paper lanterns hangs from the ceiling.
An energetic indoor performance by Japanese taiko drummers, their arms a blur of motion as they powerfully strike a massive ōdaiko drum with wooden sticks in front of an audience. In the background, a row of lit paper lanterns hangs from the ceiling.

The Hidden Waters of Great Warriors

Long before the modern era, these volcanic springs were the sanctuary of Takeda Shingen, the legendary Samurai Lord of Yamanashi. Known as “Shingen no Kakushi-yu” (The Hidden Baths), these secret waters were where Shingen and his warriors retreated to heal their battle wounds and restore their spirit.

Magma Resort Yamanashi invites you to step into this 500-year-old legacy. You are not just bathing; you are reconnecting with an ancient source of power and recovery used by Japan’s most iconic legends.

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The experience for you

The experience for you

The Grand Baths (Public)

The Grand Baths (Public)

The Grand Baths
(Public)

Experience the authentic social ritual of Japan. Our communal indoor and outdoor baths offer panoramic views of the Yamanashi wilderness, where the steam meets the mountain air.

Private Onsen (Kashikiri)

Private Onsen
(Kashikiri)

Private Onsen
(Kashikiri)

For those seeking absolute intimacy or a quiet family moment. Reserve a private bath to enjoy the volcanic waters in your own secluded sanctuary.
Private onsen bookings are available upon request and require an additional fee.

Note: Guests with tattoos are kindly requested to cover them with an appropriate tattoo cover patch while using the public onsen.
Alternatively, guests who reserve a private onsen (additional charge applies) are welcome to enjoy the facilities without covering their tattoos.

Note: Guests with tattoos are kindly requested to cover them with an appropriate tattoo cover patch while using the public onsen.
Alternatively, guests who reserve a private onsen (additional charge applies) are welcome to enjoy the facilities without covering their tattoos.

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Enjoy All 12 of Our Thermal Baths

Enjoy All 12 of Our Thermal Baths

The onsen is a place of mindfulness and respect. Here is how to enjoy it:

The onsen is a place of mindfulness and respect. Here is how to enjoy it:

The onsen is a place of mindfulness and respect. Here is how to enjoy it:

Your First Onsen: A Simple Guide.

Your First Onsen: A Simple Guide.

Our Blog guide →

Our Blog guide →

The Rinse

Use the shower stations to purify your body before entering the communal waters.

The Soak

Enter the bath slowly and allow the heat to melt away tension and travel fatigue, preserving the quiet, meditative atmosphere for everyone.

The Refresh

After bathing, wrap yourself in a soft yukata and rehydrate with our local Yamanashi spring water.

Ready to Begin Your Recovery?

Ready to Begin Your Recovery?

Experience the legendary healing waters of Yamanashi. Book your stay at Magma Resort and rediscover your balance.

Experience the legendary healing waters of Yamanashi. Book your stay at Magma Resort and rediscover your balance.

Book your stay