Yubatake Hot Springs in Kusatsu — Live Webcam Online

Yubatake — the Heart of Kusatsu Onsen

In the very center of the mountain town of Kusatsu, located in Gunma Prefecture, one of Japan's most impressive thermal springs erupts from beneath the earth. The name "Yubatake" literally translates as "field of hot water" (Japanese: 湯畑), and this name fully captures the essence of the natural phenomenon taking place here. Every minute, between 4,000 and 5,000 liters of hot water surge from the earth's depths, making Yubatake one of the most productive thermal springs in the country. This webcam offers a view of the area surrounding the spring — the parking zone and the resort buildings of Kusatsu Onsen.

Kusatsu Onsen sits at an altitude of about 1,200 meters above sea level, at the foot of Mount Shirane. The town grew entirely around its hot springs — there are no factories or large-scale industry here, everything is dedicated to a single purpose: welcoming guests who come for the healing waters. Yubatake is not merely an attraction but the main artery of the town, its symbol and pride. It is from here that water is distributed through a system of wooden channels to numerous bathhouses and inns.

How the Yubatake Wooden Channels Work

The natural temperature of the water as it emerges from the spring is about 65–70 °C — far too hot for bathing, so the water must be cooled. A brilliantly simple system is used for this purpose: the water flows through a system of seven wooden channels, which naturally cool it to a comfortable temperature before it is distributed to the bathhouses. The wooden troughs are not a decorative element but a functional engineering structure that has existed for several centuries.

The primary purpose of the wooden troughs is to cool the thermal water, which surfaces at approximately 70 degrees. As it flows through the open channels, the water releases heat to the surrounding air, gradually cooling by 10–15 degrees. This preserves the mineral composition and healing properties of the water without diluting it with cold tap water. The channel structure is periodically renewed — wood wears out from constant contact with hot mineralized water — but the operating principle remains unchanged.

The Yumomi Tradition: The Art of Cooling Water

Kusatsu is home to a unique tradition found in no other onsen in Japan. This is the yumomi (yumikomi) technique — stirring the water in the bath with wide wooden boards to cool it. Instead of adding cold water, which would disrupt the mineral composition and purity of the spring, visitors rhythmically move the boards across the water's surface, accelerating its natural cooling. This is simultaneously a practical necessity, a ritual, and even entertainment — groups of people often perform yumomi while singing, turning the process into a communal event.

The history of therapeutic bathing in Kusatsu spans about eight centuries, and throughout this time the local residents have refined their methods of working with the hot water. The yumomi tradition arose from practical necessity: the water in the baths was scaldingly hot, and there were no alternative water sources for dilution. Over time, this evolved into a cultural practice that the resort proudly demonstrates to its guests.

History of the Kusatsu Hot Springs

The origin of the Kusatsu springs is shrouded in legend. According to legend, the discovery of the springs is attributed to the semi-legendary prince Yamato Takeru as early as the 2nd century; another version credits the wandering monk Gyoki in the 8th century (Nara period). Be that as it may, documented evidence of the use of Kusatsu's hot waters dates to a much later period.

In the 12th century, according to historical records, the famous warlord Minamoto no Yoritomo (1147–1199), founder of the Kamakura shogunate bathed in the Kusatsu hot springs. This indicates that even in medieval Japan, Kusatsu was a well-known resort accessible to the highest nobility. The warlord appreciated the healing properties of the local water, and from that time onward, Kusatsu's popularity only grew.

During the Edo period (1603–1868), Kusatsu became one of the most visited onsen towns in the country. Samurai, common townspeople, and even Buddhist monks came here. The development of transportation infrastructure — roads built through mountain passes — made Kusatsu accessible to residents of Edo (modern-day Tokyo), transforming the town into a true resort center.

Kusatsu Onsen — A Resort with Centuries of History

Today, Kusatsu Onsen is a densely built-up resort town where hotels and guesthouses (ryokans) stand side by side, and thermal water flows directly from the source into the taps of every room. The town's architecture is typical of Japanese hot spring resorts: multi-story buildings with characteristic tiled roofs, narrow streets, and numerous shops selling local sweets and souvenirs. Everything here is dedicated to a single purpose — welcoming guests who come for the healing waters.

Kusatsu's water belongs to acidic sulfate springs with high sulfur and aluminum content. Locals claim it helps with skin conditions, neuralgia, joint problems, and digestive issues. Scientific studies confirm the bactericidal properties of the water — most pathogenic microorganisms cannot survive in it, making it especially valuable for therapeutic treatments.

Kusatsu Onsen is located approximately 150 kilometers northwest of Tokyo. It can be reached by bus from Ueno Station in Tokyo — the journey takes about three to four hours. Despite its distance from the capital, the town is never empty: visitors come year-round to soak in the hot baths and breathe the clean mountain air.

Climate and Nature Around Kusatsu

Kusatsu is situated in a mountainous area, and the climate here differs significantly from the lowlands. Summers are cool and comfortable — the average July temperature is about 22–24 °C, making Kusatsu a popular escape from the sweltering Tokyo heat. Winters are snowy and frosty: January temperatures drop to -5…-8 °C, and snow cover can reach a meter or more. It is in winter that Kusatsu is especially atmospheric — hot springs set against snow-covered mountains create that iconic postcard image of a Japanese onsen.

The surroundings of Kusatsu are rich in natural beauty. Nearby is the Joshin'etsukogen National Park, which offers hiking trails of varying difficulty. Mount Shirane, at whose foot Kusatsu stands, is an active volcano — it is volcanic activity that feeds the local hot springs. On the slopes of Shirane, fumarole fields can be seen — outlets of hot gases that serve as a reminder that magma churns beneath your feet.

Cultural Heritage of Kusatsu Onsen

Kusatsu is not only about water and mountains — it is a living culture. Traditions are preserved here that have long been forgotten elsewhere. In addition to yumomi, Kusatsu has the kashikara ritual — an endurance test in which a person sits in the hottest bath and tries to last as long as possible. This is not merely a pastime but a form of spiritual practice rooted in Buddhist ascetic traditions.

The local residents take pride in their heritage and carefully preserve it. In the center of the town, next to Yubatake, a small museum operates, telling the history of the springs and bathing traditions. Here you can also see antique wooden channels, yumomi tools, and photographs of Kusatsu from different eras. Admission to the museum is free — a mark of respect for the guests who come here from all over the world.

What the Camera Shows

This webcam is installed in close proximity to the Yubatake hot springs and broadcasts the parking area at the entrance to Kusatsu Onsen. In the foreground is an asphalt parking lot with white parking space markings, where several parked cars can be seen at any time. Along the edges of the parking area are green grassy embankments and hills typical of the mountainous landscape of Gunma Prefecture.

In the background, multi-story buildings are visible — hotels and guesthouses characteristic of an onsen resort town. Beyond the buildings on the horizon is a mountain range, part of the Shirane volcanic massif. The sky above Kusatsu is most often blue with light clouds, although heavy snowfall occurs here in the winter months. The camera covers the parking area and the adjacent part of the town, allowing viewers to appreciate the scale of the resort development and the atmosphere of this unique place.

This webcam shows the life of Kusatsu Onsen as it truly is — without embellishment or staged scenes. There are no set pieces here, only the reality of a mountain Japanese resort: tourists, local residents, cars, and majestic mountains in the background. The webcam operates in live mode, and every viewer can see for themselves what one of Japan's most famous onsens looks like at any given moment.