Showering Less: Why the Japanese “Washing Machine for Humans” Is Changing Personal Hygiene

More lies behind the trend than mere convenience.

In many homes, going a full day without showering is now entirely unremarkable – sometimes even two or three. What was once considered unhygienic is, for some people, beginning to look almost like self-care. At the same time, high-tech devices such as a Japanese “washing machine for humans” are emerging and reimagining personal hygiene altogether. What is driving the gradual move away from the daily shower?

Why the daily shower is losing its appeal

For decades, the rule seemed clear: anyone who cared about their appearance showered every day. A quick rinse under the shower in the morning, and that was that. Dermatologists, environmental researchers and psychologists are now increasingly questioning this ritual – and many people are acting on their findings.

“Showering less does not automatically mean less hygiene; it often means a different understanding of cleanliness.”

There are several reasons for this:

• Skin health: Showering too frequently can damage the skin’s natural protective barrier.
• Climate crisis and resource scarcity: Hot water and shower gel consume energy and raw materials.
• Everyday stress: Many people want to simplify their routines and save time.
• Technological innovation: New cleaning methods are intended to be more efficient than a conventional shower head.

The Japanese “washing machine for humans” at a glance

One striking example comes from Osaka. The company Science Co. is developing a personal-care capsule called “Mirai Ningen Sentakuki”, which roughly translates as “washing machine for the human of the future”. The device is designed to wash and dry the entire body in around 15 minutes – with almost no effort from the user.

How the futuristic washing capsule works

Visually, the technology resembles a wellness pod more than a shower. The user sits inside an enclosed capsule, while the rest of the process takes place automatically.

• The capsule closes and its interior fills with water.
• A microbubble system removes dirt and skin oil from the surface.
• Sensors record indicators such as heart rate and physical wellbeing.
• An AI adjusts the temperature, water jets, lighting and soundscape.
• Finally, an integrated system dries the body completely.

The microbubbles used are exceptionally fine and are intended to reach skin folds without the need for vigorous rubbing. Comparable technologies are already used in spa treatments and medical baths.

“The capsule promises cleansing, drying, wellness – and health data as a by-product – in 15 minutes.”

Hygiene, wellness and health monitoring in one device

The link between personal hygiene and health monitoring is particularly intriguing. While the full washing cycle is running, biometric sensors continuously measure physiological data, including:

• Heart rate
• Signs of stress and exhaustion
• Changes in circulatory parameters

An integrated AI evaluates this information and determines in real time how intense the massaging effect of the water jets should be, how warm the water needs to be, and which lighting or sound setting delivers maximum relaxation. The result resembles a combination of shower, spa treatment and mini health check.

A historic idea enhanced by technology

The concept is not entirely new. A prototype “washing machine for humans” was already presented at Expo in Osaka during the 1970s. At that point, however, it remained a concept. Today, much more capable sensors, computing technology and AI are available, which are intended to make the approach practical.

The current version from Osaka revisits that former exhibition highlight, combining it with contemporary wellness aesthetics and targeting a society accustomed to smart homes, wearables and digital health apps.

Will technology reshape our showering habits in the long term?

It remains uncertain whether capsules like these will one day appear in ordinary bathrooms or whether they will be limited to selected hotels, care facilities and high-end spas. What is clear is that they fit into a wider trend that is also changing conventional showering.

Three developments are becoming apparent:

Trend	Description
Showering less often	Many people are cutting back to every two or three days, using “flannel days” in between.
Gentler products	Mild syndet cleansers, solid soaps, shampoo bars and natural oils are replacing harsh shower gels.
Smarter devices	From water-saving shower heads to high-tech capsules, technology is intended to clean more efficiently.

While some people deliberately shower less often to conserve resources, others are trying alternatives such as dry shampoos, antibacterial wipes or zone-based personal care: underarms, intimate areas and feet every day, with a full-body wash only every few days.

How little showering can still be hygienic?

Dermatologists have stressed for years that daily hot showers with plenty of foam can do more harm than good. Skin becomes dry, itchy and more sensitive. A reduced routine can therefore make good sense, provided a few basic rules are followed.

• Clean underarms, intimate areas and feet thoroughly every day, using the basin if necessary.
• Shower as soon as possible after exercise or heavy sweating.
• Use mild, pH-neutral products, especially if you have sensitive skin.
• Keep the water lukewarm rather than consistently hot.
• Pat the skin dry briefly after showering and apply moisturiser if needed.

“People who know their bodies and pay attention to odour, sweat and how their skin feels usually find the showering routine that suits them quite quickly.”

The psychology of cleanliness: how much is habit?

Many people shower less for hygiene reasons than because they otherwise feel “uncomfortable”. This sense of cleanliness is strongly shaped by habit and upbringing. Anyone who has spent years being taught that a daily shower is compulsory may instinctively regard anything else as “dirty” – even where there is objectively no issue.

Over time, that perception can shift. People who experiment with showering less frequently often report that their desire for a daily rinse declines, without anyone around them noticing. At the same time, interest in alternative rituals is increasing: short breathing exercises, stretching or a cup of tea in the morning can partly replace the “wake-up shock” of standing beneath a water jet.

Risks, limits and useful additions

Water and soap cannot be eliminated completely. People who shower far too infrequently over a prolonged period risk unpleasant body odour, skin irritation and, in extreme cases, infections, especially in warm, moist areas of the body. Anyone with particular skin conditions should always discuss changes to their showering habits with a medical specialist.

The combination of consciously reducing showering and using smart technology becomes particularly interesting. A capsule such as the one from Osaka could, for instance, help older people or people with limited mobility to wash regularly without physical exertion. At the same time, its sensors could provide indications of stress or circulatory problems and could ease pressure on care services or doctors.

For most people, everyday changes are likely to remain more straightforward for now: one fewer shower per week, a more water-efficient shower head or a milder product. The big question is no longer how often someone “has to” shower, but what makes sense for their own skin, the environment and their available time.

One thing is certain: the trend towards showering less is not driven by laziness, but by a combination of health awareness, sustainability – and a little fascination with technology that is rethinking the daily wash.