8 Hotels Where You Can Bathe Together Before Potty Training
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When I travel to a hot spring with my kids, the thing I care about most is whether I can actually soak in the bath together with my child. It feels like such a waste to come all the way to an onsen only to have one parent bathe while the other watches the kids, simply because the child isn't potty trained yet. Time spent soaking side by side with your child sticks in your memory for years, even without a single photo to show for it.
I used to assume from the start that "a communal bath is off-limits if my child isn't potty trained," but after a few family stays, I realized otherwise. Hotels genuinely exist where you can bring a child who isn't potty trained into the onsen bath with you. Some hotels officially state that babies and toddlers are welcome in the bath, and even provide baby baths and baby-safe soap. Once you know what to look for, a trip where you actually soak in the water together is entirely achievable.
Yes, Hotels Exist Where You Can Share the Communal Bath Even Before Potty Training
It's easy to assume "a communal bath is off-limits if my child isn't potty trained," but in fact, hotels genuinely exist where you can bring a baby or young child into the communal bath with you.
Musubino Yado Airinkan, in the Hanamaki hot spring area of Iwate Prefecture, for example, explicitly states on its official site that "babies and young children are welcome in both the communal bath and the private family baths." Izu Atagawa Onsen Hotel Katara Resort & Spa, in Shizuoka, similarly states on its official site that its hot spring is open to pregnant guests and infants alike. At hotels that genuinely mean it when they say "babies welcome," you can bring a child who isn't potty trained right into the bath with you.
What's more, hotels like these almost always stock the communal bath with a baby bath, a baby seat, and baby-safe soap. Some even provide a changing mat and a diaper-disposal bin in the changing area — genuinely set up to support your wish to bathe together.
Look for a hotel that explicitly states babies and toddlers are welcome in the bath, and that stocks the communal bath with a baby bath and baby-safe soap.
There are three main ways to enjoy the bath together.
1. Get into the shared communal bath together, just as it is
At a hotel that officially states babies and toddlers are welcome, you can bring your child straight into the shared communal bath. With a baby bath and baby-safe soap already provided, both your child's first soak and washing up are worry-free.
2. Use a private family bath or an in-room open-air bath, just for your family
A private family bath or an open-air bath attached to your room lets you enjoy the water without worrying about other guests. Many hotels explicitly state that children who aren't potty trained are welcome in the private bath, making this a great fit for families who want to take their time.
3. Use a baby bath to share in the onsen atmosphere
Even at a hotel where the shared communal bath itself isn't an option, a baby bath and baby seat in the washing area let you take your time washing your child while still soaking in the onsen atmosphere. Most baby-friendly hotels come well-equipped for exactly this.
3 Things Worth Checking Before You Book
Even if you narrow your search using the "baby-friendly" filter on Rakuten Travel or Jalan, how each hotel actually handles the communal bath varies a lot. Here are the three things I always check before booking.
1. Does the hotel explicitly state that babies and toddlers are welcome in the bath?
The most reliable check is whether the hotel's official bath page or FAQ section explicitly states that babies and toddlers are welcome. If a hotel spells this out clearly, you can bring a child who isn't potty trained right into the bath with you.
2. Does the hotel have a private family bath or an in-room bath?
Even at a hotel where the communal bath itself isn't an option, a private family bath or an in-room open-air bath lets you enjoy the water together as a family. Check the official site for the private bath's cost and how to reserve it.
3. Does the communal bath have a baby bath and baby gear?
Having a baby bath, baby seat, and baby-safe soap in the washing area makes it far more comfortable to wash your child right there. Some hotels even specify whether the changing room has a diaper-changing table and a diaper-disposal bin.
The age limit for mixed-gender bathing varies by local ordinance, typically somewhere between 6 and 8 years old. Confirm the cutoff in advance.
If you're planning on a father bathing with a daughter, or a mother with a son, it's worth checking the age limit for mixed-gender bathing as well. If only one adult is traveling with the kids and there's no one to leave a child with in the room, a hotel where the communal bath welcomes babies, or one with an in-room bath, opens up more options.
8 Recommended Hotels Where Parents and Kids Can Bathe Together
From here, we'll introduce hotels where you can enjoy an onsen together with a child who isn't potty trained yet. We've spread these across the country from north to south, and included both hotels where you can use the shared communal bath and ones where a private family or in-room bath is the way to go.
1. Musubino Yado Airinkan (Hanamaki Onsen, Iwate)
A hot spring ryokan with three of its own private springs and 17 different baths. Its official site explicitly states that "babies and young children are welcome in both the communal bath and the private family baths," making it a real standout for bringing a child who isn't potty trained into the communal bath with you. The communal bath comes stocked with a baby bath, a baby seat, and baby shampoo, and a changing mat is provided in the changing area. Private family baths operate on a 45-minute reservation system, so you can also enjoy a leisurely soak with just your family.
2. Izu Atagawa Onsen Hotel Katara Resort & Spa (Higashi-Izu, Shizuoka)
A family-focused resort whose official site states that its onsen communal bath is open to pregnant guests and infants alike. A child who isn't potty trained can join you in the water here too. Rooms also come with a wooden open-air tub, so you can soak leisurely as a family. The source runs at 105°C (221°F) and is a sodium chloride–sulfate spring, leaving you warm long after you've dried off.
3. Atema Kogen Resort Belnatio (Tokamachi, Niigata)
Every communal bath (both the men's and women's sides) and every private family bath is equipped with a baby bath, a baby seat, and full-body baby soap, and the changing areas are stocked with a diaper-disposal bin, baby wipes, and even a crib. You can also soak as a family in the private "Hinoki no Yu" cypress bath. The spring is an amber-colored, mildly alkaline mineral spring known locally for leaving skin feeling soft — a highland resort worth knowing about.
4. Hakone Hotel Kowakien (Hakone, Kanagawa)
All 7 of the private family baths welcome a child who isn't potty trained into the tub. In a space that's just for your family, you can soak in the bath together with your child (60 minutes for ¥2,500, reservation required, as of June 2026). The top-floor observation bath also has a baby bath on hand — an open, airy space with sweeping views of Hakone's outer crater rim.
5. Oedo Onsen Monogatari Premium Seiunkaku (Higashiyama Onsen, Fukushima)
The bathing area is equipped with a baby bath and a baby seat, and both the men's and women's changing areas keep a crib and a diaper-disposal bin on permanent standby. Choose a room with its own open-air bath, and you can enjoy an onsen-quality soak with just your family, right in your room. This is a hotel where you can enjoy the historic waters of Higashiyama Onsen in Aizu with total peace of mind, even with a baby along.
6. Bandai Atami Onsen Hotel Hananoyu (Bandai-Atami, Fukushima)
The water is a mildly alkaline mineral spring (pH 9.18) that's gentle on the skin, and the hotel describes it as well-suited to a baby's very first onsen experience. A changing table is set up in both the changing area and the shared restrooms. Private family baths and in-room baths are also available for times when you'd rather take things slow as a family.
7. Irago Ocean Resort (Atsumi Peninsula, Aichi)
A beachfront resort where every room has an ocean view. The communal bath keeps a baby bath on hand for free, so babies are well taken care of, and there's also a barrier-free private bath with a tub about 60 cm deep, making it easy for young children or a three-generation family to bathe together. It's a wide-open soak with sweeping ocean views.
8. Hotel Nishinagato Resort (Tsunoshima, Yamaguchi)
A resort with stunning views on Tsunoshima Island. The onsen's observation bath, overlooking the Hibiki Sea, offers a baby bath to borrow, letting you share in the onsen atmosphere even with a baby along. The hotel's loaner selection of baby gear is also extensive, making it an easy trip to pack light for. The "Tsunoshima blue" seen from the seaside open-air bath is something else entirely.
Conclusion: Don't Give Up — Choose a Hotel Where You Can Share the Bath Together
Even before your child is potty trained, knowing what to look for means you really can soak in the onsen together as a family. To wrap up, here's a summary of what to check before you book.
A hotel that officially states babies and toddlers are welcome in the bath is one where you can share the communal bath together.
A private family bath or an in-room bath lets you enjoy the water together as a family.
Also check whether the communal bath has a baby bath and baby-safe soap.
It's also reassuring to check the age limit for mixed-gender bathing (prefectural ordinances vary, typically somewhere between 6 and 8 years old). Policies differ quite a bit by hotel, so checking the official site's bath page before you book is the most reliable approach. Each Kids Stay hotel page also lays out the diaper-related policies for that property.
If your family wants to play in a pool as well as an onsen, check out our companion piece on hotels where a child not yet potty trained can join you in the pool. For the bigger picture on choosing a family hotel, see our guide to the key factors in choosing a family hotel.
*This article contains advertising links to hotel booking sites. Rates, amenities, and rules are current as of June 2026. Please check each hotel's official website or booking site for the latest details.*