Kusatsu Onsen has topped national rankings of Japan’s best hot spring resorts for years running, its reputation built on an extraordinarily high natural water output and strongly acidic, mineral-rich springs believed to have therapeutic properties. At the centre of town, the Yubatake (‘hot water field’) channels steaming spring water through wooden troughs in a striking, photogenic display, surrounded by dozens of ryokan, public bathhouses and souvenir shops that have made Kusatsu a beloved retreat since the Edo period.
🗓️ At a Glance
| Location | Kusatsu, Gunma |
| Hours | Yubatake always viewable; bathhouse hours vary |
| Admission | Free to view Yubatake; public bath entry around ¥600–1,000 |
| Time needed | 1.5–3 hours |
| Best time | Year-round; winter for snow-framed steam |
What to See
- The iconic Yubatake hot water field at the town centre.
- Strongly acidic, mineral-rich spring water.
- Dozens of public bathhouses and ryokan around the town.
- A centuries-old onsen tradition dating to the Edo period.
Combine Your Visit
- Combine with Kusatsu Yumomi Performance sightseeing.
- Pair with Kusatsu Onsen Manju tasting.
- Read our Gunma overview .
Getting There
- By train + bus: JR Naganohara-Kusatsuguchi Station, then a 25-min bus to central Kusatsu.
- By car: roughly 3 hours from central Tokyo.
Tips
The water is naturally very hot and acidic — most ryokan and public baths cool it through the traditional yumomi (paddle-stirring) method before bathing. Winter visits offer a striking contrast of steam rising against snow, though roads can be icy, so plan transport accordingly.
