You tried one at a hotel in Tokyo, or at a friend’s place who’d brought one back from Japan, and you haven’t been able to stop thinking about it since. The heated seat, the warm water spray, the lid that opens on its own. A Japanese toilet — or smart toilet as they’re often called — sounds like something from a luxury magazine, but we’re fitting them into more and more perfectly ordinary bathrooms here in Valencia. The question isn’t whether they exist: it’s how much they cost and whether you’ll actually use one.
Let us be straight with you. No fluff. We’ll cover what each feature does, what it genuinely costs fitted in your bathroom, and when it makes sense — and when it’s just burning money.
What is a Japanese toilet (smart toilet) and what does it actually do?
A Japanese toilet is a toilet with an integrated bidet and built-in electronics. The concept is Japanese in origin — they call them washlets over there — and what sets them apart from a standard toilet is that they wash you with warm water instead of paper, among other things.
The features that genuinely matter are these:
- Warm water spray at adjustable pressure. The replacement for the bidet and toilet paper. This is the standout feature that justifies everything else.
- Heated seat. You notice this massively in winter. In a Valencian bathroom with no central heating, sitting down on cold ceramic at seven in the morning is no longer a rude awakening.
- Warm air dryer. Dries you without paper. Some people love it; others find it too slow.
- Auto-open and auto-close lid. Detects you approaching. More hygienic and no more lid banging.
- Deodorisation. An activated carbon filter that absorbs odours at source, inside the bowl.
- Self-cleaning nozzle. The nozzle rinses itself before and after each use. Without this, no Japanese toilet would make any hygienic sense.
Then there are the bells and whistles: night light, remote control, app connectivity, multiple user profiles. Nice to have, but not what you’re paying for.
Types: smart seat vs. complete smart toilet
You don’t need to rip out your existing toilet to get a Japanese toilet experience. There are two routes.
The smart toilet seat (or bidet seat) fits over your existing pan, provided it’s standard-sized. It’s the cheaper entry point and the one we recommend most often for trying things out without committing. The catch: you need a power outlet nearby and a water connection, so it’s almost never as simple as “swap the lid and you’re done.”
The complete smart toilet comes with all the electronics built into one sleek unit. More expensive, better-looking, and it does require a small amount of work to run water and electricity to the exact spot. If you’re doing a full bathroom renovation, this is the moment to include it — because having everything roughed in during the build is far cleaner than trying to add it afterwards.
How much does a Japanese toilet cost in Valencia?
Here are real prices, product plus installation, VAT included. What it actually costs — not the showroom fantasy.
| Option | Product | Installation | Approx. total |
|---|---|---|---|
| Basic smart seat | €250–450 | €100–180 | €350–630 |
| Mid-range smart seat | €500–900 | €120–200 | €620–1,100 |
| Mid-range complete toilet | €900–1,600 | €200–400 | €1,100–2,000 |
| Premium complete toilet | €2,000–4,000 | €250–500 | €2,250–4,500 |
Installation costs shoot up if there’s no power outlet next to your toilet — which is standard in older flats here. Running a new socket and a water connection adds between €150 and €400 depending on where your fuse box is. This is exactly why it’s far cheaper to plan it in during a renovation than to bolt it on afterwards.
Brands worth knowing: Roca has their In-Wash range, which we fit regularly because after-sales support in Spain is solid. At the top end you’ve got Japanese brands like Toto, plus premium European models. Our honest opinion, and we say this every time: for a first smart toilet, a well-known mid-range bidet seat with decent after-sales support is better value than a full smart toilet from an unknown brand that you won’t find parts for in two years.
How much water and paper does it actually save?
The environmental argument is real — just more modest than the brochures suggest. The average Spanish household uses around 133 litres of water per person per day, according to the INE (Spain’s National Statistics Institute), and the toilet is one of the biggest consumers in the home. A smart toilet doesn’t reduce cistern water use, but it does drastically cut toilet paper consumption, which carries its own water and timber footprint in production.
Where you’ll feel it most is in comfort and the reduction in paper use. For real water savings, a dual-flush cistern is a better first step — we break that down in our article on bathroom electricity and water consumption.
Is it worth it? When yes, when no
Let’s be honest. It’s not for everyone.
It clearly makes sense if you have reduced mobility or an elderly person in the house: the warm water spray and dryer restore independence and hygiene for those who struggle with paper. Also if you’re renovating your whole bathroom and can include the plumbing and wiring with minimal extra cost. And simply if you’ve tried one, loved it, and have the budget: it’s one of those things you get used to and never want to go back.
It doesn’t make sense if you’re renting and the landlord won’t cover it. Nor if your bathroom has no outlet nearby and the work to install one costs more than the unit itself. And definitely not if you want it purely because it looks modern — there are cheaper ways to make a bathroom feel premium.
A middle-ground option many people overlook: a quality wall-hung toilet with a concealed cistern gives you the design upgrade and easier cleaning for considerably less money, and you can always add a smart seat later. If bathroom technology interests you in general, take a look at our guide on when bathroom fittings need replacing and why.
What catches people off guard
Three things we always mention before fitting one. It needs electricity — a properly rated socket for a wet zone right next to the toilet: no extension leads. The dryer takes a while, so many people still end up using a small amount of paper anyway. And the unit does need maintenance: the nozzle cleans itself, but it’s electronics living in a steamy environment like everything else in the bathroom. None of this is a dealbreaker. You just need to know before the invoice arrives.
Frequently asked questions
Can I fit a Japanese toilet seat without doing any building work?
Yes, with a smart bidet seat, provided your pan is standard-sized and you have (or can get) a power outlet and water connection nearby. The plumbing side is usually straightforward; it’s the electrical work that sometimes means a small job.
Does a smart toilet use a lot of electricity?
Not much in daily use. The main draw is the heated seat and the dryer. Modern models have an eco mode and timers that cut the heat when the unit isn’t being used, so the impact on your electricity bill is low.
What happens if the power goes out?
The electronic functions — warm water, dryer, automatic lid — all stop working without power. But the cistern and flush are mechanical, so the toilet still works perfectly as a normal WC until the power comes back.
Is it actually hygienic or does it harbour bacteria?
Well maintained, it’s more hygienic than toilet paper. The nozzle self-rinses before and after each use, and most models include deodorisation. The key is following the manufacturer’s maintenance guidelines — same as any other fixture in the bathroom.
Is it worth paying for a premium model or will a basic one do?
For most people, a mid-range smart seat from a reputable brand does the job perfectly well. The premium tier adds design, more refined controls and extra features, but the price jump rarely justifies itself if what you’re really after is the core function: warm water and a heated seat.
To sum up: try one before you commit
The Japanese toilet isn’t marketing hype — the warm water wash genuinely gets under your skin, and for older people or those with limited mobility it makes a real difference to daily life. But don’t leap into a €3,000 complete toilet without experiencing one first. Start with a smart bidet seat, confirm you actually use it, and if you’re renovating, get the plumbing and wiring roughed in so you don’t pay for the work twice.
If you’re planning a renovation, now’s the time to decide properly. Work out your budget with our renovation calculator, see how we approach bathroom renovations in Valencia, and if you want ideas on how to integrate one without it looking out of place, browse our bathroom designs. And when you’re ready to talk specifics — tell us about your bathroom and we’ll tell you which option fits, what work it involves, and what it would cost fitted.
