Japanese Toilet: The Complete Guide 2026 (How It Works, Types, Prices)

Japanese toilet, washlet, bidet seat, bidet attachment… Behind these names lies one simple idea: washing with water instead of paper. But between a €25 kit and a €400 washlet seat, with or without electricity, how do you navigate the options and choose wisely? Here is the complete 2026 guide: how they work, types, real prices, pros, cons, and installation.

What is a Japanese toilet?

A Japanese toilet — also known as a washlet — refers to a toilet equipped with a water washing system. After using the toilet, a nozzle extends and sprays a precise, adjustable jet of water to clean intimate areas, where paper merely wipes. On full-featured models, the spray is followed by warm air drying.

The concept originated in Japan, where manufacturer Toto launched the first modern washlet seat, the Washlet, in 1980. Today, over 80% of Japanese households are equipped with one — to the point where going back to paper seems unthinkable to them. In France, the Japanese toilet has seen a remarkable comeback since 2020, driven by arguments of hygiene, ecology, and savings. To understand this trajectory, read our article on the history of the bidet, from the French boudoir to the Japanese washlet seat.

Japanese toilet, washlet seat, bidet: what's the difference?

The terminology often causes confusion. Here are the distinctions:

• Japanese toilet / washlet: a generic term for toilets that wash with water.
• Washlet seat (or washing toilet seat): a toilet seat equipped with a nozzle, which replaces the classic seat. This is the most common form of Japanese toilet in France.
• Washlet: a trademarked name by Toto for its washlet seat — which has become a common noun in everyday language.
• Bidet attachment: a thin kit that slides under the existing toilet seat and adds a nozzle, without replacing the seat. The simplest and cheapest solution.
• Bidet (classic): the separate basin of yesteryear, now almost disappeared from new constructions.

How does a Japanese toilet work?

The principle is the same regardless of the model: a retractable nozzle, located at the back of the toilet bowl, extends after use and sprays a targeted jet of water towards intimate areas. Depending on the model, several settings are available:

• Jet type: posterior wash, feminine wash (softer and further forward), sometimes "turbo" jet.
• Pressure: from a gentle spray to a more invigorating jet, adjustable.
• Nozzle position: adjustable front to back for precise targeting.
• Water temperature: cold, or warm (35–40 °C) on hot water models.
• Warm air drying and heated seat on electric models.

Two main categories differ in the source of pressure and hot water:

• Mechanical models (non-electric) directly use water mains pressure to propel the jet. No socket, no electrical connection. Hot water, if available, is drawn from the hot water supply of the dwelling (nearby sink).
• Electric models heat water instantly, control the jet via a remote, and add drying, heated seat, deodorizer, night light, etc.

The different types of Japanese toilets

There are four main categories, from the most accessible to the most comprehensive.

1. The bidet attachment (mechanical, non-electric)

A thin plate that slides under your current toilet seat and adds a washing nozzle. Connects to the toilet's existing water supply via a supplied T-connector — no plumber, no electricity, no drilling. Installation in 15 minutes, fully reversible. It's the ideal entry point to the Japanese toilet: effective, discreet, and by far the most economical.

2. The Japanese washlet seat

It replaces your toilet seat with a complete washing seat. There are two versions: mechanical (adjustable jets without electricity) or electric / washlet (continuously heated water, warm air drying, heated seat, remote control). This is the "complete" Japanese experience, the one that 80% of Japanese households wouldn't trade for anything.

3. The integrated Japanese toilet

A complete toilet integrating bowl and washing functions in a single, designer unit. The ultimate in comfort, but this requires replacing the entire toilet (plumbing work and a significant budget). Reserved for bathroom renovations.

4. The portable bidet

A small bottle with a nozzle, manual or rechargeable electric, that fits in a bag. Ideal for travel, camping, or trips, to maintain water hygiene everywhere — without relying on local facilities.

Japanese toilet with or without electricity: which to choose?

This is the first real question to ask, as it affects budget, installation, and usage.

The non-electric Japanese toilet (bidet attachment or mechanical seat) works thanks to water pressure. Its advantages: no power outlet needed, installation in a few minutes, reduced price, nothing to break down or consume electricity. Its only compromise: no warm air drying or heated seat — and, on simple cold water models, a jet at mains temperature. Many models, however, offer a hot water connection for a tempered jet, without any electricity.

The electric Japanese toilet (washlet) offers the complete experience: continuously heated water, drying, heated seat, remote control. In return, you need a grounded power outlet near the toilet, a higher budget, and a slight electrical consumption (around €20 to €30 per year).

Our advice: if you are new to Japanese toilets, start with a non-electric model. You get the essentials — water washing — for a minimal budget and zero technical constraints. You can upgrade later if you desire drying and a heated seat.

How much does a Japanese toilet cost?

The price depends entirely on the type chosen. Here are the real market benchmarks in France in 2026:

• Portable bidet: €25 to €50
• Bidet attachment (non-electric): €30 to €100
• Mechanical washlet seat: €100 to €200
• Electric washlet seat: €300 to €1,200
• Integrated Japanese toilet: €1,000 to €3,000 and more

Beyond the purchase price, consider the cost of use. A Japanese toilet reduces toilet paper consumption by 70 to 90%. For a four-person household that spends €150 to €400 on paper annually, the savings are immediate, and the investment is often recouped in a few months. We have detailed this calculation, as well as the ecological and health impact of paper, in our investigation: toilet paper, what they don't tell you.

Advantages of the Japanese toilet

• Superior hygiene. Water truly cleans, whereas paper merely wipes and leaves residue. For any other part of the body, we use water — the intimate area is no exception.
• Comfort and health. The water jet is gentle and non-abrasive. It is regularly recommended for hemorrhoids, fissures, sensitive skin, as well as for pregnant and postpartum women.
• Savings. 70 to 90% less toilet paper, year after year.
• Ecology. Less paper means fewer trees cut down and less industrial water: it takes 140 to 180 liters of water to produce a single roll, compared to less than one liter per bidet wash.
• Usage comfort on electric models: heated seat, drying, no need for paper at all.

Disadvantages (honest opinion)

Let's be transparent — the Japanese toilet has a few limitations to be aware of before diving in:

• The purchase price of electric models can be a deterrent. The solution: start with a low-budget mechanical model.
• Reliance on electricity for washlets: in case of a power outage, some functions are unavailable (mechanical models, however, always work).
• Minimal maintenance: the nozzle requires occasional cleaning to prevent limescale — a matter of a few minutes per month.
• An adjustment period. The first few days can be disorienting… but the vast majority of users then declare they can't live without it.

How to install a Japanese toilet?

Good news: except for the integrated unit, installation is within everyone's reach and requires neither a plumber nor renovations. A bidet attachment can be installed in 15 minutes; a washlet seat in 20 to 30 minutes. The connection is made to the existing toilet water supply via a supplied T-connector, and the entire setup remains reversible — no permanent marks.

We have written a complete step-by-step guide, including a tool list, compatibility, and troubleshooting: how to install a Japanese toilet seat.

Which Mizu Japanese toilet to choose?

The Mizu range covers every profile and every budget:

Frequently asked questions about Japanese toilets

Is a Japanese toilet really more hygienic than toilet paper?

Yes. Toilet paper redistributes more than it cleans: it moves residue around, leaves microscopic traces, and can irritate the mucous membrane. The water jet cleans thoroughly, gently, without rubbing. This is why water washing is recommended for sensitive skin, hemorrhoids, or after certain procedures.

Do Japanese toilets require electricity?

No, not necessarily. Attachable bidets and mechanical washlet seats only operate with water pressure, without any power outlet. Electricity is only required for comfort functions (continuously heated water, warm air drying, heated seat) of washlet models.

Do I need a plumber to install it?

No, except for a one-piece toilet. An attachable bidet or a washlet seat connects in minutes to the existing water supply, via a supplied T-connector. No drilling, no work, reversible installation. A wrench and a screwdriver are enough.

Isn't the cold water jet unpleasant?

Tap water is tempered, and contact is brief: most users get used to it within a few days and even find it refreshing. If you prefer a lukewarm jet, opt for a model that can be connected to hot water (like the Mizu Onzen) or an electric seat that heats the water.

Is my toilet compatible?

The vast majority of toilets with exposed tanks are compatible. Points to check: the shape of the bowl, the spacing of the mounting holes, and the available space at the back. Our installation guide details all criteria — if in doubt, send us a photo, and we'll check.

The Japanese toilet is no longer a distant luxury reserved for Tokyo hotels. Between an attachable bidet for under €100 and a full electric toilet seat, there is now a solution for every budget and every installation — to be installed by yourself, in a few minutes, with no major works.

Japan has made it a standard. All you have to do is adopt it at home.