8 Hotels With Pools Kids in Diapers Can Use: Swim Diaper Rules and How to Find Them
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Note: Counts such as "more than 500 properties" come from the facility data of hotels listed on Kids Stay (as of September 2026, not the total number of hotels in Japan)
Even if your child isn't potty trained yet, there are plenty of hotels with a pool you can use together, as long as they wear a swim diaper and a swimsuit. In Kids Stay's listing data (as of September 2026), more than 100 hotels have a pool that welcomes kids in diapers, with this rule confirmed in their official guidance. The fine print still differs from hotel to hotel, though, with rules such as "toddler pool only" or "no regular disposable diapers."
One of the places where kids get the most excited on a family trip is the pool. Yet plenty of families give up on it, thinking that a pool is out of reach while their child is still in diapers. At a hotel with a shallow kids pool, or an indoor heated pool you can enjoy all year whatever the weather, a first swim is easy to plan.
Find hotels with a pool that allows swim diapers
Find hotels with a pool that allows swim diapers
On Kids Stay you can search from the start for hotels where a child who isn't potty trained can use the pool in a swim diaper. Just choose your area and party size.
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An all inclusive resort in Minamiboso, Chiba. Children who aren't potty trained can use the pool while wearing a swim diaper.
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Even Before Potty Training, Some Hotels Let You Get Into the Pool Together
People tend to assume that the pool is off limits until a child is potty trained, but there are plenty of hotels where a swim diaper layered under a swimsuit is all you need.
Hotels That State Swim Diapers Are Allowed
Hoshino Resorts Risonare Yatsugatake, for instance, states clearly on its official pool page that a child who is not yet potty trained may use the pool while wearing both a swim diaper and a swimsuit. Grand Mercure Awaji Island likewise notes on its official website that children who are not potty trained may use the pool if they wear a swim diaper.
Three Things to Check When Choosing a Pool
There are three points worth checking when you choose a pool.
Confirm three things: that a swim diaper plus swimsuit is allowed, that there is a shallow kids pool, and whether the pool is indoors and open year round.
1. The rules on swim diapers
Many hotels allow the pool with a swim diaper layered under a swimsuit. That said, the fine print varies, with rules such as no regular disposable diapers, or swim diapers only, so read the pool terms of use on the official website. At hotels that sell swim diapers in the shop, such as Risonare Yatsugatake, you are covered even if you forget to pack them.
2. Whether there is a shallow kids pool
A children's pool around 30 to 45cm deep lets kids play with peace of mind whether or not they have started swimming. Hotels that publish the depth, the way Grand Mercure Awaji Island states that the section about 30cm deep is open to preschoolers, are the easiest to choose.
3. Indoors or outdoors, and the season
An indoor heated pool frees you from the weather and the season, so you can play from before check in until after check out. Outdoor pools are often open in summer only, so match your choice to the timing of your trip. Indoor heated pools usually hold the water at a steady temperature too, so a baby is less likely to get chilled.
The Changing Room and the Poolside Layout
Beyond that, it is reassuring to check before you book whether you may bring your own float ring or arm bands, whether baby floats are available to rent, and whether the changing room has a baby cot or a nursing space. With a baby along, the timing of changes and feeds is hard to predict, so knowing how the poolside is laid out saves you from scrambling on the day. Many baby friendly hotels cover these details on the pool page or the FAQ of their official website.
Swim Diaper Rules Differ From Hotel to Hotel
"Swim diapers are fine" sounds simple, but when you compare the official guidance, the conditions vary a little from place to place. To avoid surprises at the pool reception on the day, it helps to know the common rule types and what to pack in advance.
The Most Common Rule: A Swimsuit Over a Swim Diaper
The most common rule is a swim diaper with a swimsuit worn over it. Hotel Nishinagato Resort and The Busena Terrace both say the pool can be used with this layering. A swim diaper alone or a swimsuit alone may not be accepted, so bring both to be safe.
Some Hotels Allow the Toddler Pool Only, or Refuse Regular Diapers
At some hotels, children in swim diapers may use the toddler pool only. DoubleTree by Hilton Naha Shuri Castle says children in swim diapers may use only the toddler pool. Grand Prince Hotel Takanawa likewise says the toddler pool can be used with a swim diaper on. If you want to swim together in the main pool, this is a point to check before you book. Some hotels also clearly refuse regular disposable diapers, such as Nesta Resort Kobe, whose guidance reads: "The pool cannot be used in diapers. Please use swim diapers."
Many Hotels Sell Swim Diapers on Site
Hotels that sell swim diapers at the pool reception or in the shop spare you a panic if you forget them. Hoshino Resorts Risonare Yatsugatake, Hotel Epinard Nasu, and The Busena Terrace are among those that sell them. Sizes can be limited, though, so it is best to bring your own from home and treat the on site shop as a backup.
8 Recommended Hotels Where Parents and Kids Can Swim Together
Here are the hotels where you can enjoy the pool with a child who isn't potty trained. They are spread from the north of Japan to the south, and the list covers both indoor pools you can use year round and outdoor pools with spectacular summer views.
1. Hoshino Resorts Risonare Yatsugatake (Yatsugatake, Yamanashi)
Ilmare, the year round indoor pool, is a wave pool that generates waves up to 1.2m high. The hotel states officially that a child who is not yet potty trained may use the pool while wearing both a swim diaper and a swimsuit. Swim diapers are sold at the pool reception (4 for 800 yen, as of June 2026). There is also a kids area that starts at 0cm depth, which is perfect for a baby's first time in a pool.
2. Hotel Epinard Nasu (Nasu Highlands, Tochigi)
The indoor heated pool has a 25m pool plus kids areas 30cm and 60cm deep, and even babies under 1 year old can join you when they wear a swim diaper. Swim diapers are sold in the shop, and you may bring your own float ring. Because it is indoors, you can enjoy that first swim all year round without watching the weather.
3. Grand Mercure Awaji Island Resort & Spa (Awaji Island, Hyogo)
The pride of this hotel is a garden pool overlooking the sea. Its official website states clearly that children who are not potty trained may use the pool if they wear a swim diaper, and that the section about 30cm deep is open to preschoolers. Your baby can play in the shallow area while an older sibling takes the deeper end, so every age is covered.
4. Grand Mercure Minamiboso Resort & Spa (Minamiboso, Chiba)
An all inclusive family resort on the coast. The official guidance for the pool says that children who are not yet potty trained may use it while wearing a swim diaper. It is easy to reach from central Tokyo, and the location lets you enjoy the sea and the pool on the same trip.
5. Grand Mercure Nasu Highlands Resort & Spa (Nasu Highlands, Tochigi)
There is a garden pool included in the all inclusive plan, and the official guidance states that children who are not potty trained may use the pool if they wear a swim diaper. A shallow kids area means children can splash about together whether or not they have started swimming. Diapers and other supplies are sold on the first floor, so a forgotten item is easy to fix.
6. Izu Atagawa Onsen Hotel Katara (Higashi Izu, Shizuoka)
The year round hot spring pool, called Jungle Spa, comes with official guidance that children who are not yet potty trained are fine in a swim diaper. It is indoors, so the weather does not matter and you can play from before check in until after check out. The hot spring admits infants as well, so the bath and the pool are both open to the whole family.
7. Irago Ocean Resort (Atsumi Peninsula, Aichi)
An outdoor pool with a spectacular view over the sea from 100m above sea level. There is a children's area 40cm deep, where a swim diaper layered under a swimsuit lets everyone play together. The view of Cape Irago from the pool is something special, and it suits a summer family trip perfectly.
8. Hotel Nishinagato Resort (Tsunoshima, Yamaguchi)
A summer only outdoor pool looking out on the vivid blue water off Tsunoshima, known locally as Tsunoshima blue. There is a children's area 45cm deep, where a swim diaper under a swimsuit lets everyone enjoy the water together (free for overnight guests). After the pool, a walk along the shore is right there. The generous list of baby gear for loan also makes it easy to arrive with light bags.
travel_exploreFind a pool that welcomes kids in diapers, by area
Area by area lists of hotels whose pools you can enter in a swim diaper
Find hotels with a pool that allows swim diapers
Find hotels with a pool that allows swim diapers
We have already selected the hotels whose pools you can enter in a swim diaper. Just add your area and party size to narrow the list down to places where your child can have a first swim.
Frequently Asked Questions
Can a child who isn't potty trained use the pool?
At hotel pools, many allow it as long as the child wears a swim diaper. The usual rule is a swimsuit layered over the swim diaper, and some hotels allow the toddler pool only. Check the pool usage guidance on the official website before you book.
How do I find a hotel with a pool my child can use before potty training?
Kids Stay's list of hotels with a pool that welcomes kids in diapers shows only hotels whose official guidance confirms swim diapers are allowed. Narrow it down by area and you will quickly find options in the region you want to visit.
Can my child use the pool in a regular disposable diaper?
Assume not. Regular disposable diapers soak up water and swell, so many hotels require a dedicated swim diaper. Some hotels sell swim diapers on site, but the size may not fit, so bringing your own is the safe choice.
From how many months old can a baby use the pool?
The minimum age differs from hotel to hotel. Some, like Hotel Epinard Nasu, say even babies under 1 year old can join you in a swim diaper. Ask your pediatrician about the right age and your baby's health, and if you do go in, choose an indoor heated pool with a steady water temperature and let your baby get used to it in a shallow kids area for short stretches.
Make That First Swim Happen at a Hotel That Allows Swim Diapers
Even before potty training, a swim diaper under a swimsuit lets parents and children get into the pool together. Here is a final summary of what to check before you book.
Choose a hotel that officially states a swim diaper plus swimsuit is allowed.
A shallow kids pool, around 30 to 45cm deep, makes a first swim much easier.
Indoor pools run year round, outdoor pools are usually summer only. Match your choice to the timing of your trip.
The rules on swim diapers differ in the details from hotel to hotel, so the surest step is to read the pool terms of use on the official website before you book. Each hotel page on Kids Stay also lays out the pool and diaper related policies in one place.
If your family also wants to soak together in a hot spring or a communal bath, take a look at hotels where a child in diapers can join you in the onsen too. The bigger picture of how we choose family hotels is set out in our criteria for choosing a hotel with kids.
Note: this article contains advertising (links to Rakuten Travel). Prices, facilities, and usage rules reflect information as of June 2026. Please confirm the latest details on the official website or booking site of each property.
Find hotels with a pool that allows swim diapers
Find hotels with a pool that allows swim diapers
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