Yumomi (‘hot water kneading’) is a traditional method developed in Kusatsu to cool the town’s naturally scalding, over 50°C spring water to a bathable temperature without diluting its mineral concentration, performed by stirring the water with large wooden paddles in a coordinated rhythm. At the historic Netsu-no-Yu bathhouse, performers in traditional dress demonstrate the technique on stage several times daily, accompanied by a folk song, turning a practical necessity into an entertaining cultural show that visitors can also try their hand at.
🗓️ At a Glance
| Location | Kusatsu, Gunma |
| Hours | Shows typically run several times daily, ~9:30–16:30 |
| Admission | Around ¥700–800 |
| Time needed | 20–30 min |
| Best time | Year-round |
What to See
- Performers in traditional dress paddling scalding spring water.
- A rhythmic folk song accompanying the performance.
- The historic Netsu-no-Yu bathhouse setting.
- Audience participation opportunities to try the paddling technique.
Combine Your Visit
- Combine with Kusatsu Onsen sightseeing at the Yubatake.
- Pair with Kusatsu Onsen Manju tasting.
- Read our Gunma overview .
Getting There
- By train + bus: JR Naganohara-Kusatsuguchi Station, then bus to central Kusatsu, Netsu-no-Yu near the Yubatake.
- By car: roughly 3 hours from central Tokyo.
Tips
Check the daily show schedule on arrival, as performances run at fixed times rather than continuously. Volunteering to join the paddling demonstration, when offered, is a memorable hands-on way to engage with the tradition.
