Kanto Kids Spaces
Kanto Hotels With Kids Spaces: Indoor Play at Onsen Resorts, Bay and Highlands
For families who want the kids to play indoors even in rain or winter. We narrowed down Kanto's kids spaces, which vary widely in size and age range, by prefecture and by verified facilities.
14 areas · 563 hotels (total listings across these areas)
You set out on a trip with the kids on a rainy day or a winter weekend, only to find there is not much to do outside the hotel. Worried about moments like that, many families look for a hotel with a kids space inside. But kids spaces vary enormously in size and age range: some are too cramped for a baby, others too tame for a school-age child.
Hotels in the Kanto region (Tokyo and the surrounding prefectures) fall into three broad types. The first is the large hot spring resort in places like Nasu, Kinugawa and the Boso Peninsula, where indoor play areas, indoor climbing and obstacle courses, and even pools are all under one roof. The second is the lounge-style bay or city hotel in Maihama or Shiomi, centered on a smaller play corner you use while waiting to check in or between meals. The third is the highland resort in Kita-Karuizawa or Minakami Kogen, where an indoor play area is paired with outdoor adventure courses and experiences unique to the highlands. Different types mean different sizes and age ranges; that is the starting point.
To be specific, Grand Mercure Nasu Highlands Resort & Spa has separate zones: an indoor play area with soft flooring where even babies under 1 can spend time, and an athletic zone for ages 2 to 6. Hoshino Resorts RISONARE Nasu has net play structures and a ball pit in a space with a ceiling about 10 m high. In Chiba, Ryugujo Spa Hotel Mikazuki Ryugutei has a crawling corner for babies, and you can also book a kids concept room (a guest room) with a bouldering wall. At Grand Mercure Minamiboso Resort & Spa, the play area with a slide and educational toys is open even before check-in. Kamenoi Hotel Kamogawa has an indoor kids park for hotel guests only, open to children from age 1. Hotel Green Plaza Karuizawa has about 120 outdoor adventure course elements, and Tokyo Bay Shiomi Prince Hotel has a free kids room on the first floor where children play with their shoes off.
Whether it is for hotel guests only, whether there is a fee, what the age limit is, and what hours it is open: these differ from hotel to hotel. This page organizes them within the scope of publicly available information and marks anything not stated as "please confirm." Our general guide to choosing a kids space, along with 8 picks from across Japan, is covered in a separate column on choosing kids spaces. Prices and hours can change, so treat this as information as of September 2026 and check the latest details on the official website and booking sites.
Features to look for in this collection
Three Types of Indoor Kids Spaces in Kanto: Onsen Resorts, Bay Lounges and Highland Resorts
Typical examples: for hot spring resorts, Grand Mercure Nasu Highlands Resort & Spa; for the lounge type, the kids area next to the Rainbow Lounge at Grand Nikko Tokyo Bay Maihama; for highland resorts, the outdoor adventure course at Hotel Green Plaza Karuizawa. The sections below go prefecture by prefecture to check the size of each play area and how to use it.
Chiba: Choose Between Big Boso Resorts and the Bay Area
The Boso Peninsula is home to large resorts where everything from play areas to pools is under one roof, while Maihama has city-style kids areas. Which hotel suits you depends on whether you want a play area usable from age 0 or equipment that lets kids burn off energy.
Chiba Prefecture
An overview of family-friendly hotels across Chiba Prefecture. A good starting point for comparing the big Boso resorts side by side with the bay area hotels
Kamogawa
Kamenoi Hotel Kamogawa has a guests-only kids park, and Kamogawa Sea World Hotel has a kids room you can use around mealtimes
Minami-Boso
Choose from the play area with a slide at Grand Mercure Minamiboso Resort & Spa, or the crawling corner and the kids concept room (a guest room) with a bouldering wall at Ryugujo Spa Hotel Mikazuki Ryugutei
Maihama & Urayasu
The indoor play facility at Sheraton Grande Tokyo Bay Hotel and the lounge-side kids area at Grand Nikko Tokyo Bay Maihama make an interesting contrast
Tochigi: Nasu's Big Kids Spaces and Play Areas at Kinugawa and Shiobara Onsen Hotels
Nasu offers play areas with soft flooring and huge spaces filled with net play structures, while Kinugawa and Shiobara have indoor play areas at hot spring inns and hotels. The range runs from hotels with zones divided by age to casual corners in the lobby, so you can choose to match your child's age.
Tochigi
At Ooedo Onsen Monogatari Premium Hotel New Shiobara, the kids corner with a slide and trampoline is free to use
Nasu Highlands
Compare hotels with play areas of very different scales: Grand Mercure Nasu Highlands, RISONARE Nasu and Hotel Sun Valley Nasu
Kinugawa Onsen
Choose between the playroom at Kinugawa Onsen Hotel and the glass-walled kids room at Kinugawa Onsen Asaya
Gunma, Ibaraki and Saitama: Highland Resorts and Playrooms at Onsen Hotels
Highland resorts in Kita-Karuizawa and Minakami Kogen pair indoor play areas with outdoor adventure courses and seasonal experiences. In Ibaraki and Saitama, the focus is on indoor facilities that give you somewhere to go on a rainy day, such as in-house parks at hot spring inns and digital play equipment.
Gunma
Minakami Kogen Hotel 200 has a free kids room, and Hotel Matsumotoro in Ikaho Onsen has a small kids room
Ibaraki
The kids park at Kamenoi Hotel Tsukubasan requires a reservation, and the kids room at Oarai Hotel has a ball pit
Saitama
The main building of O Park OGOSE has a kids park that includes Little Planet, a digital theme park
Kita-Karuizawa
Choose between the playroom and outdoor adventure course at Hotel Green Plaza Karuizawa, or the kids corner with a simple slide and the indoor heated pool at Karuizawa Club Hotel Karuizawa 1130
Tokyo and Kanagawa: Lounge-Style City Hotels and Hakone Onsen Hotels
In Shiomi, Tokyo, a city hotel close to the station has a free kids room on the first floor, lounge style. Hakone splits into a hotel you can combine with the hot spring facility next door and a smaller onsen inn with a play area and bookshelves in the lobby.
Tokyo
At Tokyo Bay Shiomi Prince Hotel, the first-floor kids room, where children play with their shoes off, is for hotel guests only and free to use
Kanagawa
Choose between the kids space at Hakone Hotel Kowakien and the first-floor kids space at KKR Hakone Miyanoshita
Hakone
Kowakien pairs easily with Yunessun, the hot spring theme park next door, while at Miyanoshita a manga corner and a swing on the terrace give parents and kids each their own way to relax
Different Types Suit Ages 0 to 2 and Ages 3 to 5
For ages 0 to 2, look for hotels with a baby area featuring soft flooring, a crawling corner or a small slide. Grand Mercure Nasu Highlands Resort & Spa has a soft-floored area where even babies under 1 are safe, Ryugujo Spa Hotel Mikazuki Ryugutei has a crawling corner, and Kamenoi Hotel Kamogawa has a baby area with a small slide for children from age 1. For ages 3 to 5, hotels with equipment that gets kids moving are a better fit: the athletic zone for ages 2 to 6 in Nasu, the Ryugujo Station adventure course, the net play structures at RISONARE Nasu, and the slide and trampoline at Hotel New Shiobara.
Using It as a Refuge on Rainy or Winter Days: Guests Only? Fee? Age Limit?
If you plan to use a kids space as a refuge from rain or cold, the quickest approach is to check first whether it is for guests only, whether there is a fee, what the age limit is, and what hours it is open. Kamenoi Hotel Kamogawa is for ages 1 to 12, with a charge of ¥500 each for children 3 and up and their parents, and free for ages 1 to 2. Hotel Green Plaza Karuizawa normally charges a fee but is free for guests staying in its baby rooms, and Tokyo Bay Shiomi Prince Hotel and Minakami Kogen Hotel 200 are listed as free. Kamogawa Sea World Hotel's is limited to dinner and breakfast times, Kamenoi Hotel Tsukubasan requires a reservation, Oarai Hotel does not allow children to use it unaccompanied, and for hotels whose information does not say, please confirm directly.
Tips for traveling with kids
- checkWith children ages 0 to 2, make checking for soft flooring or a crawling corner your top priority, so you are not stuck for somewhere to let them play once you arrive
- checkSome hotels let you use the play area before check-in and after check-out. At Grand Mercure Nasu Highlands Resort & Spa and Grand Mercure Minamiboso Resort & Spa, the time before and after your travel becomes playtime too
- checkThe playroom at Kinugawa Onsen Hotel and the kids room at Kamogawa Sea World Hotel are listed as unstaffed. Plan on a parent staying with the kids
- checkAt hotels that charge a fee, it helps to confirm whether the fee applies only to children or to parents as well. Kamenoi Hotel Kamogawa is for ages 1 to 12, with children 3 and up and their parents paying, and ages 1 to 2 free
- checkMany hotel pools are seasonal or open only for limited periods, and they are separate from the indoor play areas. If you are going in winter, check separately whether the indoor play area is open year-round
- checkSome hotels require a reservation or have set hours. These often overlap with dinner or bath time, so checking the hours on the official website before you arrive makes things go smoothly
Recommended hotels in this collection (37)
Selected automatically from the top-ranked hotels in each area.
Grand Mercure Nasu Highlands Resort & Spa
Hoshino Resorts RISONARE Nasu
Grand Mercure Minamiboso Resort & Spa
Ryugujo Spa Hotel Mikazuki Ryugutei
Kamenoi Hotel Kamogawa
Sheraton Grande Tokyo Bay Hotel
Tokyo Bay Shiomi Prince Hotel
Hotel Green Plaza Karuizawa
Hakone Hotel Kowakien
Kisui no Yado Monya
See all hotels in this collection (37)expand_more
- Grand Mercure Nasu Highlands Resort & Spa
- Hoshino Resorts RISONARE Nasu
- Grand Mercure Minamiboso Resort & Spa
- Ryugujo Spa Hotel Mikazuki Ryugutei
- Kamenoi Hotel Kamogawa
- Sheraton Grande Tokyo Bay Hotel
- Tokyo Bay Shiomi Prince Hotel
- Hotel Green Plaza Karuizawa
- Hakone Hotel Kowakien
- Kisui no Yado Monya
- Kameyama Onsen Hotel
- Kamogawa Grand Hotel
- Kamogawakan
- Kamogawa Onsen Gyominan Maruki
- Asayuma no Ki
- Hotel Emion Tokyo Bay
- Mitsui Garden Hotel PRANA Tokyo Bay
- Kinugawa Onsen Hotel
- Hotel Epinard Nasu
- Pension Ajiwai
- Hotel Sun Valley Nasu
- Kinugawa Onsen Asaya
- Nikko Kinugawa Hotel Mikazuki
- Ooedo Onsen Monogatari Premium Matsunoi
- Hotel Matsumotoro
- Oarai Hotel
- Hotel Terrace The Square Hitachi
- BIO-RESORT HOTEL & SPA O Park OGOSE
- REF Omiya by VESSEL HOTELS
- Karuizawa Club Hotel Karuizawa 1130 / Hewitt Resort
- Kitakaruizawa Blueberry YGH
- Keio Plaza Hotel Tokyo
- Vacation House Familia Kozushima
- Sengokuhara Shinanoki Ichinoyu
- Hotel Okada
- Hakone Shiunso
- Maholova Minds Miura
Frequently Asked Questions
Which family-friendly hotels in Kanto have the best indoor kids spaces?
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For families with preschoolers, good candidates are Grand Mercure Nasu Highlands Resort & Spa, with a soft-floored indoor play area and age-based zones; RISONARE Nasu, with net play structures under a ceiling about 10 m high; and Ryugujo Spa Hotel Mikazuki Ryugutei, with a crawling corner. In the city, Tokyo Bay Shiomi Prince Hotel has a free kids room.
Are there kids spaces where even babies under 1 can play?
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At Grand Mercure Nasu Highlands Resort & Spa, NASOBIBA has a soft-floored area designed so that even babies under 1 can spend time there safely. Ryugujo Spa Hotel Mikazuki Ryugutei has a crawling corner. The kids park at Kamenoi Hotel Kamogawa is for children from age 1 and has a baby area with a small slide.
Are the kids spaces free? Can non-guests use them?
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It varies by hotel. The kids areas at Tokyo Bay Shiomi Prince Hotel and Hotel New Shiobara are listed as free. Kamenoi Hotel Kamogawa is for children from age 1, with children 3 and up and their parents paying a fee and ages 1 to 2 free. Hotel Green Plaza Karuizawa normally charges a fee but is free for guests staying in its baby rooms. Many are for hotel guests only, so please check the official website.
Can we spend a whole day indoors at the hotel on a rainy or winter day?
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NASOBIBA at Grand Mercure Nasu Highlands Resort & Spa is an all-weather space where kids can play even on rainy or cold days, and guests can use it for free before and after check-in. RISONARE Nasu has a huge space with net play structures that works in any weather, Ryugujo Spa Hotel Mikazuki Ryugutei has an indoor heated pool open year-round, and the kids space at Hakone Hotel Kowakien is also good for rainy days.
What kind of kids space suits children ages 3 to 5?
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Hotels with equipment that gets kids moving are the best fit. Grand Mercure Nasu Highlands Resort & Spa has an athletic zone for ages 2 to 6 and a big outdoor slide, Ryugujo Spa Hotel Mikazuki Ryugutei has the Ryugujo Station adventure course, and Hotel Green Plaza Karuizawa has a large outdoor adventure course.