
Kusatsu Onsen is a hot spring resort town in the mountains of Gunma Prefecture. Its spring is famous for both its prodigious daily output and its high sulfur content, which makes the entire town smell of rotten eggs but is said to cure a host of bodily ills. In fact, the locals say the hot springs in Kusatsu cure any sickness but love sickness.
Whatever its healing properties, you wouldn’t want to jump into the spring at the source, as it comes bubbling out of the ground at up to a scalding 95°C (203°F). You could add cold water, but that would dilute the beneficial mineral content, so the locals use a traditional method called yumomi, which involves splashing the water around with big tongue depressors while singing and dancing.
I love Japan.
This is downtown Kusatsu. From the source, the hot, sulfuric water first flows through a series of troughs in the village square. It helps with the cooling as well as filling the town with warm, billowing clouds of atmospheric steam. If you like that kind of thing, anyway.
At the end of the square, the water cascades into a pool, from which it is pumped to the surrounding hotels, ryokans and bathhouses, including Netsu no Yu (literally “hot water”), where there are daily yumomi performances held in a beautiful wood building with stained glass windows depicting bathing scenes. Glass works are Kusatsu’s other local specialty.
As an added bonus for classic manga fans, one wall is taken up by a mural drawn by famous artists who visited Kusatsu for a conference in 1980. You may recognize some of your favorite characters taking a soak.
▼ “Kusatsu has good water, doesn’t it!”
▼ Fujio Akatsuka’s Bakabon in the tub
The performance takes place around a large bath at the foot of a stage.
First, female dancers come out, singing the yumomi folk song, stirring the water with wooden paddles and keeping time by tapping them against the edge of the bath.
Then they invite audience members to take a stab at paddling while everyone cheers them on.
At this point in the proceedings, it doesn’t seem like the water would be cooled all that much. After all, they’re just stirring it around really, but we are assured there will be more splashing after a dance performance.
Two kimono-clad ladies perform a dance that looks very much like locker-room towel shenanigans in slow motion. They splash water on their towel, they twist and flick, they even bite the towel for reasons that aren’t quite clear. It looks both graceful and silly at once and is tremendous fun to watch.
▼ Mmm, towel.
▼ Getting their kung-fu towels ready.
▼And twist and snap!
One the dancing portion of the show is finished, the true yumomi begins and you can see how it cools the water down, as there is some spectacular splashing. The dancers push their paddles deep into the spring and then press down on the far end with all their body weight, flinging a geyser of water into the air. With all that scalding water flying around, it’s hard to believe the dancers escape unscathed, but, then again, with all the steam in the room, it’s hard to know for sure if they did or not…
▼ Definitely try this at the hotel later. They can’t complain because it’s culture!
Check out the videos to see all the towel-flicking, water-sloshing action!
▼ Teasing the audience with dance and towel skills
▼ And now for the main event!
All images and videos: RocketNews24















The 10 best Japanese hot spring resorts locals want to go back to again and again
We go looking for the free kaoyu hot spring facebath of onsen town Kusatsu【Photos】
Cheap Japanese ryokan at Kusatsu Onsen is hidden at the back of a traditional store
New Square Enix Cafe reveals Final Fantasy, Dragon Quest, Nier, and Fullmetal Alchemist menu items
Burger King Japan offering all-you-can-eat quad-burgers, whoever eats the most gets more in December
7-Eleven Japan releases a chocolate chip sandwich… that tastes like ice cream
Starbucks adds new Fruit Gummy sweets to stores in Japan
Family Mart commits “reverse fraud” in new Giant All-Star Festival, and we couldn’t be happier
New Tokyo sweets shop offers 648 different mochi ice cream dumpling combinations
Pump yourself up with Yokohama’s new extravagant Cool Fuel ice cream
Godiva melts minds by releasing a new corn chocolate drink in Japan
Ghibli’s No Face continues to demonstrate his generous character growth by dispensing soy sauce
This shop combines traditional Japanese sweets with…mayonnaise?!?[Taste test]
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
Japanese convenience store shows us how to dress for the rainy season
Kyoto public junior high school becomes first in Japan with a hoodie school uniform
Uniqlo reveals third round of massive 100-year-anniversary manga T-shirts for Jump’s Shueisha
Japanese rice cooker recipe gives us a tasty new way to enjoy vegetables and wieners
Tokyo’s Pokémon Cafe reopens this month with brand-new sweets and Pikachu show
Starbucks Japan unveils new Frappuccino showcasing “mottainai” culture
Tourists brave Typhoon Jangmi to queue at two famous sites in Tokyo
Osaka is hosting a “hentai” event, but it’s probably not what you think
Tokyo’s life-size Gundam anime mecha statue will be removed this summer
Ichiraku Ramen-inspired ramen sets from Naruto anime pay homage to Naruto, Sasuke, and Sakura
Kanji ice cream becomes a sell-out hit in Japan
New official Ghibli anime food cookbook will teach you how to make Ponyo’s ramen and more
Japanese convenience store Lawson launches new “mini supermarket” chain, L Minimart
Japan’s real-world Pokémon hot spring’s first photos are here![Photos]
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events