National Registered Tangible Cultural Property
Iwamuro-onsen, Niigata
Small Ryokan KOMATSUYA

For reservations, please feel free to call 81-256-82-2021or send a mail to
info@iwamuro-komatsuya.com

We pride ourselves on fresh, raw hot spring water.

  • Experience the strong smell of sulfur in the Black Onsen "KUROYU".

  • No added water, heating, or circulation.Genuine, delicious, exquisite hot spring water.


All of our baths are directly sourced from Iwamuro Onsen well.

All bathrooms can be used privately by locking them from the inside.

Enjoy the hot springs to your heart's content with your family or as a couple.

Please enjoy fresh green in spring, autumn foliage, and the winter snow viewing.

Open-air bath

It is the open-air bath overlooking the cedar grove.
Open-air bath was made using a stone that was in the back of the woods for a long time.
The pillars using the cedar of "Yahiko Shrine".

Indoor bath “Reigan no Yu"

It is the indoor bathroom, which was built at the beginning of the Showa.

This bath is characterized by stone with the taste and natural marble floor.
Please enjoy the natural hot spring water of Iwamuro "KUROYU".

[Iwamuro Onsen]

Iwamuro Onsen, nicknamed "Spirited Wild Goose Hot Spring" after legend has it that a wild goose once healed its wounds, has a history spanning approximately 300 years.
Water Quality: Salt-earth hydrogen sulfide spring
Effective for: Rheumatoid arthritis, neuralgia, wounds, burns, chronic skin conditions, and chronic gynecological conditions.

*All baths in the hotel, including those in the rooms, are filled with natural hot spring water. It is unfiltered and unadded water.