Hot Springs in Boun
Please take your time and enjoy the comparison of the hot water from each of the two different sources
and the six differently quaint hot spring baths
.
Bandai-no-yu [source: Bandai Mine].
Large bath Open-air bath Sauna
Bandai no Yu 
Bandai no Yu Open-air bath 
Bandai no Yu Open-air bath 
sauna
Saino Yu (West Hot Spring) [Souce of spring: West Kawara].
Large Public Bath Open-air bath
western hot spring 
West hot spring Open-air bath
Yuusan-no-yu (hot water of Mt. Yuusan) [fountainhead: Nishi-no-kawara and Bandai-ko].
The west Kawahara fountainhead to the right and the Bandai fountainhead to the left.
Two sources of spring water can be enjoyed at the same time.
Large bath Open-air bath Sauna
bathhouse used for prostitution (Edo period) 
Bandai souce of spring Yuguchi 
Nishi-no-kawahara fountainhead hot spring 
Yuzan-no-yu Open-air bath 
Yuuzan-no-yu Terrace 
sauna
You may enter from check-in (2:00 p.m.) until check-out (10:00 a.m.).
The men’s and women’s baths are switched at dawn and will be closed for one hour (3:30 am to 4:30 am) at
to allow for a quick cleaning. The sauna is available until 11:00 p.m.
The hours of each bath are as follows
[Male]
Bandai-no-yu/2pm – 3:30am
Nishi-no-yu/3pm – 3:30am
Yusan-no-yu/4:30am – 10am
[Women]
Yusan-no-yu/2pm – 3:30am
Bandai-no-yu/4:30am – 10am
Nishi-no-yu/4:30am – 10am
About the Sainokawara Springs
It is a hot spring that is drawn from Nishi-no-Kawahara, a famous place in Kusatsu. It has a long history together with the Yubatake source. It is one of the representative hot springs in Kusatsu, and is characterized by its softness to the skin and the ease with which the water blends in.
About Bandai Steel Source
Bandai-ko is a hot spring that erupts deep within the Hon-Shiranesan Mountains. Its gush temperature is as high as 94~95 degrees Celsius, making it a good quality and very powerful hot spring. It has excellent sterilizing and anti-inflammatory properties.
To allow you to fully enjoy the hot springs of Boun
Kusatsu Onsen has over 100 natural hot springs of various sizes, and boasts the largest volume of hot spring water in Japan, the hot spring powerhouse that the area is known for. The common spring quality is acidic sulfur-containing aluminum sulfate and chloride hot springs. In addition to the general benefits of hot springs (nerve pain, muscle pain, joint pain, frozen shoulder, motor paralysis, stiff joints, bruises, sprains, chronic digestive diseases, hemorrhoids, poor circulation, recovery from illness, and health promotion), the hot springs are also highly effective for skin diseases, chronic gynecological diseases, diabetes, high blood pressure, and arteriosclerosis.
About the temperature of the water
When you soak in the hot water, you may feel a tingling sensation on your skin and the water may feel hotter than the actual temperature. This is also a characteristic of acidic hot spring water. We do our best to keep the temperature at 42-3 degrees Celsius without adding water, but if you feel the water is too hot or too lukewarm, please let us know. If it is too hot or too warm, please let us know and we will adjust the temperature as needed.