
Whether you’re gaming, studying, or working from home, these ashiyu boots let you take the footbath with you wherever you go!
Just the other week, we heard about a new pair of boots that promised to give us all the toasty warmth of a Japanese hot spring bath for our feet. And these weren’t just designed to make it feel as if we had our feet in water — they actually do cover the feet in water, so this was one product we knew we had to try.
▼ The “Ashiyu Boots” (“Footbath Boots”) retail for 9,790 yen (US$86.40).
While footbaths are great for keeping you warm, they usually require you to stay seated in one place, which means you can’t usually multitask and tick things like household chores off your to-do list while having a soak.
However, because these boots act like snug little portable footbaths, allowing you to take the hot water with you wherever you go, we decided to really put them to the test by enjoying a regular evening in them.
▼ Each pair of boots comes with a pack of 30 bicarb tablets, because a true ashiyu contains salts and minerals to help soothe tired muscles.
The first thing we noticed about the boots was their super light and soft texture. Being made from waterproof wetsuit material, we’d thought these would be hard to slip on and off, so we sized up when we ordered them but we now realised this was a mistake, as there was plenty of room to move in them.
▼ However, they were still nice and cosy, even without any water in them.
The rubber wetsuit material is actually on the inside of the boot, and the soles have a nice non-slip layer for stability.
The boots were excellent quality, so we had high hopes that this would turn out to be a very nice way to enjoy a cosy night in. Taking a quick look at the included instructions, we grabbed one of the bicarb tabs from the pack…
▼ …and popped it into a litre (33.8 ounces) of hot water.
It’s recommended to use water that’s on the slightly hot side, at around 43-45 degrees Celsius (109-113 degrees Fahrenheit), so it doesn’t cool down too much when you put your feet into the boots.
▼ Our water was a piping hot 45 degrees Celsius.
Once the bicarb tab has completely dissolved in the water, you simply pour half the liquid into one boot, half the liquid into the other, and slide your feet into the boots.
▼ It felt super hot at first, but we soon got used to it. Hot baths in Japan are usually around 43-45 degrees Celsius, after all.
It was certainly a strange experience to have our feet soaking in hot water despite not being able to see any hot water, and things felt even stranger when we stood up and walked around in them. It felt as if we were breaking some big taboo — as if we were doing something naughty in a place where we shouldn’t — but again, we soon got used to it.
▼ In fact, after a few minutes, things went from strange to awesome, as the muscles in our legs began to relax as if we were having a gentle leg-and-foot massage.
With the relaxed, warming sensation spreading from our toes to the rest of the body, we decided to sit down and really relax, by playing a game of Far Cry 6 — our ultimate idea of relaxation.
However, after a while, the heated battle against armed forces caused us to break out into a slight sweat, and the fact that we were fighting in a humid tropical setting amped up the heat even further.
▼ If you want to get warm quick in winter, you’ll want to wear these boots while gaming.
We were super impressed with the way these boots kept our tootsies nice and warm, especially when sitting in one place for a while. Because we’d sized up, though, and there was only half a litre of water in each boot, our footbaths cooled down to around 35 degrees Celsius after around 15 minutes.
However, according to the makers of the boots, that’s where the magic of the bicarb steps in. Hot springs that contain bicarbonate, such as Nagayu Onsen in Oita Prefecture, are able to warm the body even at relatively low temperatures.
So even though the temperature had cooled somewhat, we still kept the boots on, and after leaving the couch and our battle in Far Cry 6, we decided to do some housework in them.
The water inside each boot moves every time you take a step, which brought back childhood memories of sloshing about in rainboots filled with water after jumping in puddles.
▼ Walking in these is incredibly fun, and a little mind-bending, as you feel like you’re kicking water with every step!
The one thing we do recommend is not sizing up in these boots, because the extra room made us feel as if our feet were sliding around in them. The boots themselves weren’t sliding, due to the grip on the soles, so we were safe to walk in them, but we found ourselves taking slow, heavy steps around the house like a blue-booted Godzilla.
We attempted to vacuum but that proved to be difficult — no wonder we never see Godzilla with a vacuum cleaner — so we washed some dishes and made a pot of rice instead. It felt odd to be working in the kitchen with our feet in puddles of water, but it was an odd that we liked and could definitely get used to.
After about an hour of wearing them, we decided it was time for us to swap our Godzilla feet for human ones, so we stomped off to the bathroom, stepped into the bath, and slid the boots off, allowing the puddles of water to drain out of them.
▼ Then we hung them upside down to dry
Looking at our feet, we were surprised to find they weren’t wrinkly at all after the long soak — they were actually silky smooth! The bicarb worked wonders on the skin, and we vowed then and there to use these as much as possible through winter.
Now that footbath boots exist, surely a full-body hot spring suit is on the cards in the future? Although, come to think of it, tearing a hole in a suit of water would definitely turn your home into a disaster zone. And no army of Godzilla mops would be able to completely dry that mess!
Related: Ashiyu Boots
Images © SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]


















New footbath boots bring the healing waters of a Japanese onsen to your home
One of the longest footbaths in Japan makes for an unforgettable hot spring experience【Photos】
This is possibly the coziest train in all Japan thanks to onboard hot spring footbaths【Pics】
Pokémon hot spring footbath opening in Japan this spring
Japan’s real-world Pokémon hot spring’s first photos are here![Photos]
Japan now has human refrigerators inspired by Japanese vending machines
Japanese convenience store releases Japanese convenience store-flavor fried chicken
Studio Ghibli releases anime T-shirts that pay homage to one of Hayao Miyazaki’s most personal films
Hatsune Miku collaborates with Hokusai’s art in new Vocaloid ukiyo-e illustration series [Pics]
Starbucks Japan releases new fireworks collection that captures the beauty of a summer festival
Family Mart’s new Tokyo flagship convenience store doesn’t feel convenient, but is that a problem?
Starbucks Japan releases new Discovery Series collection celebrating local regions and traditions
Tokyo’s viral 90-yen cafe pop-up returns to Harajuku with yogurt coffee
Japan’s favorite quasi-local curry launches convenience store version – Does it match the real deal?
Japan’s ultracompact kei car taxis are now ready for travelers to ride, if you know where to find them
Cup Noodle unveils first-ever cold-water instant ramen in Japan
Japanese government ID card and app to be required for certain Pokémon card purchases next month
Teen girl in Japan refuses to be victim, personally escorts train pervert to police for arrest
Is Japan’s tourism boom slowing down? Foreign visitor numbers fall for first time in five years
Evangelion beautifully reimagined as iconic classical Japanese folding screen art series [Photos]
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
Studio Ghibli has a new anime out, and there’s only one place in the world where you can see it
Japanese ninja certification exam attracts 131 candidates from Japan and abroad
Salomon releases Japan-exclusive Mt. Fuji hiking gear that doubles as an amazing souvenir
Japan triples departure tax, foreign tourists and locals now must pay more to leave country
Japan launches first overnight Shinkansen bullet train between Tokyo and Osaka this summer
Family Mart opens new “Famima” flagship store in Tokyo that’s like a tourist attraction
Sanrio Character Poll announces winners, Hello Kitty absent from top 10 in many countries
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
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
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
Nearly half of Pokémon hot spring’s statues have been damaged less than two months after opening
Honey, I’ve shrunk the Japanese bath controls! New miniatures celebrate a home icon
Setting up a campfire-heated footbath at our cheap Japanese country house【SoraHouse】
We go looking for the free kaoyu hot spring facebath of onsen town Kusatsu【Photos】
Japanese onsen stand is part gas station, part hot spring vending machine
Secret tent onsen in the forest is one of the most unusual hot springs in Japan
Just how confusing is Japanese onsen culture for a first time visitor?
Eight unforgettable hot springs, as recommended by Japan’s “Professor Bath”
We both do and do not recommend hiking to Tokyo’s beautiful mountain beer garden in midsummer
Confessions of a gaijin: 12 things we do that we’d never admit to Japanese people