The spring quality is a free-flowing sodium bicarbonate spring with a spring temperature of 39 degrees, and the color of the hot water is ocher.
Irinoha Onsen is characterized by an abundant amount of hot water that flows out at a rate of 500 liters per minute. The spring quality is a sodium bicarbonate/chloride spring (containing sodium bicarbonate), which is colorless and transparent, has a sweet smell of hydrogen sulfide, and turns light yellow-brown after a few hours.

At Irinonami Onsen, there is a day-trip hot spring facility “Yamahatoyu” and an accommodation facility “Irinoha Onsen Yumoto Yamahatoyu”.

Yamagato-yu has a large public bath made from cedar logs and a log bath made from a huge zelkova tree.

Irinoha Onsen Yumoto Yamagutoyu is a quiet inn surrounded by the nature of Okuyoshino. All guest rooms are equipped with open-air baths with free-flowing hot springs, so you can relax and enjoy the hot springs.

Irinoha Onsen is said to be effective for neuralgia, muscle pain, sensitivity to cold, and recovery from fatigue. This hot spring is recommended for those who want to enjoy a relaxing hot spring in the nature of Okuyoshino, deep in the mountains.