Toilet Training in Japan: Cloth Diapers, Timing and the Modern Approach

Find out how Japanese families have moved from cloth diapers to relaxed, child-paced toilet training, and which ideas travel well to homes anywhere.

Published October 19, 2026 at 10:44 AM JST | By Tokyo Paul

Quick answer: In Japan, toilet training is called toire toreningu, and stopping diapers is described as "omutsu o hazusu" (taking off the diaper). Families and nurseries usually follow a patient, step-by-step approach tied to the child's signals. A Japanese study published in 1987 found that children stopped diapers at around 27 months on average, whether they wore cloth or disposable diapers.

The word omutsu and its cloth-diaper past

The everyday word for diaper is omutsu. A Japanese dictionary entry explains that it comes from mutsuki, an older word for swaddling cloth, with the polite prefix "o" added; speakers no longer hear the prefix as polite. For generations, babies wore cloth omutsu that were folded, pinned, washed and dried in the sun.

The phrases built around the word show how Japanese people think about training. "Omutsu o hazusu" means to take off the diaper, the start of training, and "omutsu ga toreru" means the diaper has come off for good. Both put the diaper at the center of the story: the goal is not a deadline but the day the child no longer needs one.

Disposable diapers and the timing question

When disposable diapers spread in Japan in the second half of the twentieth century, some people worried that the dry feel would stop babies from noticing wetness and make training later. A 1987 Japanese study compared children in cotton and disposable diapers, including identical twins who used different types. Both groups stopped diapers at about 27 months on average, and the authors found no evidence that disposables lengthened diaper use.

The same study noted that the average age of stopping had become about six months later than it was twenty years earlier. That fits a wider pattern. A Wikipedia overview of toilet training notes that the typical starting age moved later over the twentieth century, and that washing machines and disposable diapers changed expectations about timing by easing the burden on parents. It also notes that the American Academy of Pediatrics and the Canadian Paediatric Society suggest beginning around 18 months, as long as the child is interested.

Signs of readiness and the patient approach

Japanese parenting advice usually frames training as something the child leads. Hamamatsu City's English guidance for residents, for example, names 18 to 24 months as a good window to begin, tells parents not to rush or scold, and recommends plenty of praise when the child does use the toilet. It suggests learning the child's own rhythm and the signs that show a need to go, and offering the toilet at easier moments, such as before bed at night.

Typical cues include squirming, holding the crotch, or stopping play suddenly. The same guidance suggests moving from diapers to underpants at a suitable point, since a child who feels wet becomes more aware of the need to go, and it advises against forcing the issue: if nothing happens after about three minutes, it is fine to stop and try again next time. Many parents also keep diaper changes on a regular schedule, which helps them see the child's rhythm, and talk about how a wet or dry diaper feels so that children build awareness of their own bodies.

Toilets, potties and bathroom gear

Japanese homes and public restrooms are set up with small children in mind. Many toilets have a child seat insert that fits over the adult seat, and a step stool is a common aid. Shops sell potties in a range of shapes, and some families use a seat that folds onto the regular toilet. Public restrooms in stations and shopping centers often have wall-mounted baby chairs, so a parent can keep a young child safe in the stall.

Bathrooms are usually small and the toilet is often separate from the bath. Many homes use warm-water toilet seats with controls on a panel. Those controls can surprise a toddler, so parents commonly keep the child away from the buttons until the child is bigger. A calm, familiar routine, with the same small seat at the same time of day, is more helpful than any particular piece of equipment.

How nurseries and daycare handle it

Nurseries (hoikuen) and kindergartens work alongside parents on toilet training. Staff usually take a group-based approach, with toilet visits built into the daily rhythm: after waking, before meals and before going outside. Staff and parents exchange notes in a contact notebook, so both sides can see what is working. Many centers wait until a child shows readiness rather than starting everyone at once.

Policies differ from center to center. Some nurseries ask families to supply cloth diapers, while others use disposable ones, so parents should ask about the rules at enrollment and about spare clothes to pack. Watching other children use the toilet can motivate a toddler, which is one reason families often find that group care speeds things up gently. Staff also use praise rather than pressure, and they often tell parents about successes so that the same words of encouragement are heard at home. Children who are tired or unwell are usually given a break from training for a few days.

Tips for parents from overseas

The Japanese approach fits well with advice from many pediatric groups: wait for readiness, keep it positive, and treat accidents as normal. Parents abroad who want to try a Japanese-style routine can use the same ideas. Make diaper changes predictable. Name the feeling of a wet diaper aloud. Offer the potty at times of day when the child is likely to go. Praise the attempt as much as the result.

Accidents are expected. Spare pants, a wet bag and washable mats make outings easier, and some families use a waterproof layer on the futon during the transition to sleeping without a diaper. Night dryness often comes later than daytime control, so many parents keep a night diaper until the child wakes up dry for a stretch. There is no single correct age, and a child who is late by one family's standards may be right on time by another's.

Common mistakes and gentle reminders

Rushing is the usual pitfall. Pressure from relatives or the calendar can turn training into a contest, and children who are not yet ready often resist. Changing too many things at once, such as a new home and a new nursery, can also slow progress. A pause is not a failure; many children succeed within a few months of a steady start.

Cultural differences should be taken lightly. Customs about age and method vary within Japan itself and from family to family. This guide shares general cultural information and published research, not professional advice; for a child's health or if toilet training seems unusually difficult, talk with a pediatrician or local clinic.

Frequently Asked Questions

At what age do children in Japan usually stop using diapers?

A 1987 Japanese study found an average age of about 27 months for stopping diapers, similar for cotton and disposable users. Current practice varies by family and nursery, and the figure is only an average. Most children master daytime control over a stretch of months, with nights later.

Do Japanese families still use cloth diapers?

Some do, and some nurseries ask for them, but disposable diapers are very common. Policies vary by nursery, so check enrollment materials. Families who like cloth can use it at home. There is no evidence in the 1987 study that disposable diapers delay training.

What does "omutsu o hazusu" mean?

It means taking off the diaper, the Japanese way of describing the start of toilet training. A related phrase, "omutsu ga toreru," says that a child no longer needs diapers. Both phrases focus on the child's readiness rather than on a set age or deadline.

Want to go deeper? Tokyo Paul's book Japanese Potty Training Secrets is available on Amazon.

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