Kusatsu Onsen is often introduced as one of Japan’s top three hot spring towns, and for many travelers, it becomes their first true onsen experience. Located in the mountains of Gunma Prefecture, Kusatsu is famous for its powerful hot spring water, traditional townscape, and long history as a healing destination.
This guide explains what makes Kusatsu Onsen special, how to enjoy it, and what first-time visitors should know before going.
What Makes Kusatsu Onsen So Special?
The defining feature of Kusatsu Onsen is its water quality. Kusatsu’s hot springs are naturally acidic and extremely hot, flowing directly from underground volcanic sources. The water is believed to have strong antibacterial properties and has long been associated with health and recovery.
Unlike many onsen towns where hot spring water is cooled or adjusted, Kusatsu is proud of using pure, undiluted source water, even though it requires special techniques to make it bathable.
Yubatake: The Heart of Kusatsu
At the center of the town lies Yubatake (the Hot Water Field)—Kusatsu’s most iconic landmark. Here, hot spring water flows through wooden channels, cooling naturally while filling the air with steam and the distinct scent of sulfur.
Yubatake is not just a photo spot. It represents Kusatsu’s philosophy of working with nature rather than altering it. At night, the area is beautifully illuminated, creating a calm and atmospheric setting perfect for evening strolls.
Yumomi: A Tradition Unique to Kusatsu
One experience unique to Kusatsu is Yumomi, a traditional method of cooling hot spring water by stirring it with large wooden paddles—without adding cold water.
Today, Yumomi performances can be seen at Netsunoyu, where visitors can learn about the history of Kusatsu while enjoying a short cultural show. It is both entertaining and educational, especially for first-time onsen travelers.
Public Baths You Should Not Miss
Kusatsu is known for its excellent public bathhouses. Some of the most popular include:
- Sai-no-Kawara Rotenburo
A large open-air bath surrounded by nature, ideal for relaxing after a day of walking. - Ohtakinoyu
A modern facility that recreates traditional bathing methods, including step-by-step temperature baths. - Local Neighborhood Baths
Smaller, free or low-cost baths used by residents, offering a more local experience.
These options make Kusatsu accessible even for travelers not staying at a ryokan.
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Staying in a Ryokan in Kusatsu
Staying at a ryokan is one of the best ways to experience Kusatsu Onsen. Many ryokan offer:
- Multiple indoor and outdoor baths
- Kaiseki-style meals using seasonal ingredients
- Tatami rooms and traditional hospitality
Accommodation ranges from luxury ryokan to more affordable family-run inns, making Kusatsu suitable for various budgets.
Best Time to Visit Kusatsu Onsen
Kusatsu is a year-round destination, but each season offers a different charm:
- Winter: Snow-covered open-air baths create a classic onsen atmosphere
- Spring: Fresh mountain air and fewer crowds
- Summer: Cooler temperatures compared to Tokyo
- Autumn: Colorful foliage surrounding the town
Winter is particularly popular, but travelers seeking a quieter experience may prefer late spring or early autumn.
How to Get to Kusatsu Onsen
From Tokyo, Kusatsu Onsen can be reached in approximately 3 hours by train and bus. While it takes slightly longer than some onsen towns, the journey rewards visitors with a deep mountain retreat atmosphere.
Once in town, Kusatsu is compact and walkable, making it easy to explore without a car.
Is Kusatsu Onsen Right for You?
Kusatsu Onsen is ideal for travelers who:
- Want to experience one of Japan’s most famous hot springs
- Appreciate strong, traditional onsen water
- Enjoy walking through classic hot spring towns
- Are visiting Japan for the first time and want an iconic onsen experience
For those seeking luxury, tradition, and authenticity in one place, Kusatsu rarely disappoints.
Looking for a tailor-made Japan travel experience?
Kusatsu Onsen has earned its reputation not through trends, but through centuries of consistent quality. From its steaming Yubatake to its powerful mineral waters, the town offers an experience that feels deeply rooted in Japanese culture.
For anyone planning a hot spring trip in Gunma—or Japan as a whole—Kusatsu Onsen remains an essential destination worth experiencing at least once.
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