A revolutionary washing machine cleans clothes with zero water and it’s already on sale in Japan

In a country where technology is treated with the care of a craft, this is not a flashy prototype built to win headlines. It is a product you can purchase, wheel into your home and put to work the very same evening. The promise is as straightforward as it is bold: cleaner laundry, with zero water involved in the wash action.

On a slate-grey afternoon in Shibuya, people clustered around a box about the size of a countertop appliance, quietly humming like a thoughtfully engineered kettle. A demonstrator fed a lipstick-marked shirt into a sealed drum, tapped the touchscreen, and the chamber answered with a soft, controlled hiss. About ten minutes later, the cotton emerged already dry-slightly cool to the touch and oddly light in the hand-like a piece of science fiction that had finally become ordinary.

Everyone leaned in to sniff. There was no dampness and no scented “clean” cloud-just a neutral absence, like a shirt that had never been worn. A grandmother murmured to her granddaughter about rain-soaked seasons and the laundrettes she used to rely on. The rep simply smiled and lifted the water drawer to show it was empty. As phones rose for photos, the line that stuck in the air was clear: no water, no trick.

The machine that washes without water: a closed-loop CO2 system

Here is the mind-bending part: the drum never fills with water. Instead, it locks shut. The unit injects pressurised, recycled CO2 and agitates the fabric with micro-pulses designed to lift oils, odours and fine particles. The loosened dirt moves into the CO2 stream, where it is caught by an internal filter while the gas is cycled round and round. In other words: zero water for the wash action, and your clothes come out dry.

I saw it used in a Tokyo flat, where a young couple ran what they called a “post-park” load-toddler T-shirts, a cardigan, and a scarf that had bravely survived a noodle lunch. The cycle finished in 18 minutes. They tipped out the filter cup-grey fluff rather than sludge-then took a photo like proud new parents. We all know how laundry can feel like a task that somehow multiplies; this felt like cutting it in half.

If you are imagining dry cleaning, you are in roughly the right neighbourhood-but not quite at the same address. Traditional dry cleaning relies on solvents. This relies on a sealed, closed-loop CO2 system more commonly associated with high-end industrial cleaning and even decaffeinated coffee production. What makes it viable at home is miniaturisation plus safety engineering: sensors track pressure and temperature, a carbon cassette captures micro-soils, and the CO2 is recondensed so it can be reused. The claim, at least on paper, is a process that is cleaner, quieter and gentler on fabrics.

One practical implication is how it fits into modern living: it is not built around the idea of a weekly mountain of wet washing. It is built around frequent, small “refresh” cycles-something closer to how people actually treat workwear, school kit and everyday layers in busy households.

How to live with it day to day

Used as an “everyday refresh” machine, it is easy to enjoy. Combine lightweight tops, office shirts, knits, denim and sports layers in 1–2 kg loads. Choose modes such as “Odour + Oil” for food and sweat, “Pollen” for spring allergies, or “Office” for shirts and blouses. Most programmes land in the 12–25 minute range. Because there is no water bath, you are not sorting for colour bleed in the usual way. When the cycle ends, remove items promptly and hang them for a minute so the fibres can relax.

Heavy soiling is another matter. Mud, blood and thick sauces can bind to fibres in ways a gas process cannot always break down, so it is sensible to pre-treat stubborn marks with the manufacturer’s stain stick or a very small amount of eco-gel. Denim and cotton chinos tend to come out crisp; terry towels sometimes need a traditional wash to regain their loft. And, honestly, most people are not doing that every day. The realistic approach is to keep a conventional washer for bedding, towels and deep-clean weekends, and let this unit eliminate the daily pile.

Early testers in Osaka say it earns its keep on gym kit and school uniforms. One engineer I spoke to-grinning like he was about to pull a coin from behind your ear-put it plainly:

“The win isn’t magic. It’s friction we took out of your week,” he said. “Shorter cycles, no drying, less waiting, fewer excuses.”

• Best for: odours, oils, city dust, pollen, smoke, everyday sweat
  
• Less ideal: caked mud, heavy make-up transfer, pet accidents
  
• Load size: 1–2 kg is the sweet spot; think five shirts or a light mixed load
  
• Noise: a low hum, roughly like a quiet conversation
  
• Care: empty the filter cup weekly; replace a carbon cartridge quarterly
  

A useful mindset shift: treat maintenance like you would a vacuum cleaner. You are not handling messy wastewater or detergent residue; you are simply removing what the machine has captured. That small routine is part of what makes the experience feel less like “laundry day” and more like a quick reset.

Why this matters more than a shiny gadget

Laundry consumes water and time. A typical home washer uses 50–100 litres per load, and many urban households run four cycles a week. Scale that across a city-then a world dealing with tighter drought conditions-and the numbers become hard to ignore. A waterless machine chips away at that impact one dry shirt at a time, and it also avoids the energy burden of tumble-drying. Already on sale in Japan, the first release is limited (a handful of retailers plus direct sales), but it signals a direction for home garment care. Company literature suggests 0.3–0.5 kWh per cycle and near-total CO2 recapture; independent labs will scrutinise those figures, and they should. Even so, the broader point stands: less water, less waiting, fewer microfibre releases, and more wear from the clothes you already own.

The trade-off is habits. You will still want a standard washer for bedding and the mud of winter weeks. You may lean more on pre-treatment sticks for problem stains. You will empty a filter much like you empty a vacuum. In return, the Tuesday-night 9 pm panic load turns into a 15-minute, dry-to-wardrobe routine-small, repeatable wins.

Cost and running costs

Price-wise, the launch models begin at around ¥148,000 in Japan (roughly in the region of £750–£850, depending on exchange rates), which is comparable to a premium front-loader. Day-to-day running costs are designed to stay low: the CO2 circulates in a sealed loop; a capture cartridge is replaced after dozens of cycles; the filter cup needs only a simple rinse. There is no detergent dosing, no water inlet hoses to leak, and no lint baking onto a heater. Clothes avoid hot-water shock and harsh tumbling, which can help fabrics last longer, colours stay truer, and linings keep their shape. That durability may be the most genuinely “green” part of the proposition.

Limits, safety, and why Japan gets it first

There are clear limits. This will not erase grass stains from a child’s sliding tackle or charcoal smears from a summer barbecue in a single pass. At least for now, it is best understood as a complement rather than a complete replacement. The company has hinted at “wet-assist” pods for extreme messes-an optional add-on that mists microlitres of water to activate certain enzymes. Let’s be honest: hardly anyone will do that every day.

Safety questions naturally follow. CO2 is non-flammable and widely used in food and drink. Here, the chamber is sealed with multiple valves and pressure-release safeguards. If a sensor flags an issue, the unit vents to a capture tank rather than into the room. As for smells: there are none-unless you neglect the filter rinse for a month. The footprint is smaller than a standard washer, the weight is closer to a compact dryer, and installation is genuinely plug-and-play.

So why Japan first? The match is both cultural and practical: smaller homes, a design sensibility that values quiet efficiency, and a public already comfortable with air-purifying and deodorising technology. Add the convenience-store mindset-fast, clean, always available-and the product feels as natural beside a rice cooker as it does near a wardrobe. International launches will take longer: certifications, local servicing networks and consumer education are not overnight tasks.

One more under-discussed factor is microfibres. Without a water bath, the shedding dynamics change, and anything that does come off can be trapped in the internal filter rather than flowing towards rivers and the sea. Lab evidence is early, but the premise is compelling: fewer invisible threads in the ocean, fewer synthetics in fish-an outsized downstream benefit from a small box in the kitchen.

What shifts when laundry stops being wet

Picture weeknights where “I’ll wash it now” does not also mean “I’ll hang it up, wait for it to dry, and then forget about it”. The rhythm of home life changes. The daily layer of laundry becomes quicker and lighter, while the heavy-duty session shrinks into a weekend corner. Friends will ask whether it is real, then try it, then shrug because it simply works. The climate case is practical-less water, less heat, longer garment life-but the human case is even simpler: fewer frictions, fewer smells, fewer excuses. When technology disappears into the background, it is usually because it has found the right job to do. This feels like that.

The remaining question is speed: how quickly it spreads beyond Japan-and how we redefine “clean” when “wet” is no longer the default.

Key point	Detail	Why it matters to you
Waterless cleaning	Closed-loop CO2 dislodges oils, odours and fine particles	Saves water and delivers clothes that are dry-to-wear in minutes
Real-world use	Best for everyday loads; keep a traditional washer for heavy soiling	Cuts daily hassle without demanding a total lifestyle overhaul
Cost and upkeep	Launch price around ¥148,000; rinse the filter and replace a carbon cartridge	Predictable running costs and minimal maintenance

FAQ

• Does it truly use zero water?
  For the wash action, yes. It relies on recirculated CO2 rather than a water bath. A tiny amount of water may be used for internal self-cleaning, but not to wash your clothes.
• Will it remove tough stains like mud or red wine?
  Light food oils, sweat, smoke and city dust disappear quickly. Thick mud and dye-heavy stains may need a pre-treatment stick or a conventional wash.
• Do I need special detergents?
  No liquid detergent is required. The system uses pressure, CO2 and a capture cartridge. Optional pre-treatment pens can help with stubborn spots.
• How much does it cost and where can I buy it?
  In Japan, it starts at around ¥148,000 via selected retailers and the manufacturer’s website. Broader availability will follow regional certifications.
• Is it safe to use at home?
  It is built around sealed chambers, pressure sensors and fail-safe venting to a capture tank. Noise is low, and there is no hot drum or exhaust steam.