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Ryugujo Spa Hotel Mikazuki Ryugutei
forumWhat families say
Families report enjoying Ryugutei, the family wing of Ryugujo Spa Hotel Mikazuki - one of the Kanto region's largest spa and entertainment resorts - especially its year-round indoor Aqua Park, the summer-only 250-meter Garden Pool, entertainment facilities like Omatsuri Land and Ryugujo Station, and its railway-, vehicle-, and baseball-team-themed themed rooms. Note: since March 2026, onsen (hot spring) supply to the communal bath has been temporarily suspended (regular bathing remains available).
Categories
Kids Facilities
Aqua Park (indoor heated pool)
Aqua Park (indoor heated pool)
A year-round indoor heated pool with a water slide and an illumination show.
Garden Pool (summer only)
Garden Pool (summer only)
- calendar_monthSeason:Summer only
An outdoor pool with ocean views and a 250-meter lazy river, open June 13 to September 27, 2026.
Ocean Spa (outdoor pool)
Ocean Spa (outdoor pool)
- calendar_monthSeason:Confirm with hotel
An outdoor pool where palm trees sway in the sea breeze - a relaxing spot to soak up the sun.
Omatsuri Land
Omatsuri Land
An indoor play space packed with old-fashioned festival games - shooting galleries, ring toss, and an arcade corner.
Ryugujo Station
Ryugujo Station
A play space realistically recreating a retired Isumi Railway train car and a Kominato Railway bus. Inside, kids can try climbing play equipment and a driver's-seat experience, and the waiting room has a giant Plarail train set.
Kids Themed Rooms / Railway & Bus Rooms / Chiba Lotte Marines Room
Kids Themed Rooms / Railway & Bus Rooms / Chiba Lotte Marines Room
A wide range of themed guest rooms: ocean-, forest-, and sky-themed kids' themed rooms (with a climbing wall, jungle gym, and educational toys), Kominato Railway / Isumi Railway / steam-locomotive / adventure / construction-vehicle rooms, a Chiba Lotte Marines room, a modern Japanese-style room, and a Phiten room using Metax technology.
Communal Bath (onsen supply temporarily under maintenance)
Communal Bath (onsen supply temporarily under maintenance)
A communal bath with an open-air bath overlooking the sea and a variety of tubs.
- •Since March 20, 2026, onsen (hot spring) water supply to some tubs in the communal bath has been suspended for emergency maintenance of the hot spring equipment; the communal bath itself remains open as usual, and the resumption date is undecided.
- •The open-air bath at the Spa Wing's men's communal bath, "Ryugu no Yu," is partly closed (per a notice dated April 4, 2026).
- •In-room bathtubs use regular tap water, not onsen water.
Kids Amenity Bar
Kids Amenity Bar
A rental corner in Ryugutei offering handy items for families traveling with babies and toddlers, available on request. Children's amenities, such as animal-motif toothbrushes, can also be freely selected.
- •Quantities are limited, and some requests may not be able to be fulfilled.
Overview
Ryugutei is the family-oriented lodging wing of Ryugujo Spa Hotel Mikazuki, one of the Kanto region's largest spa resorts, in Kisarazu, Chiba. The resort brings together a wide range of play spaces: the year-round indoor heated pool Aqua Park (with a water slide), the summer-only (June 13 to September 27, 2026) 250-meter Garden Pool, the outdoor Ocean Spa, the indoor entertainment space Omatsuri Land, Ryugujo Station (recreating a retired Isumi Railway train car), and the Animal Resort NOAH. Guest rooms include a variety of kids' themed rooms themed around railways, buses, vehicles, and the Chiba Lotte Marines baseball team.
Ryugutei is the family-oriented lodging wing within Ryugujo Spa Hotel Mikazuki in Kisarazu, Chiba. It's about 5 minutes from the Kisarazu-Kaneda IC on the Tokyo Bay Aqua-Line, and a free shuttle bus runs from JR Kisarazu Station and the Kaneda Highway Bus Terminal.
Water and Play
Aqua Park (an indoor heated pool with a water slide, open year-round), Garden Pool (summer only, June 13-September 27, 2026, a 250-meter lazy river), Ocean Spa (an outdoor pool), Omatsuri Land (an indoor space with shooting galleries, ring toss, an arcade corner, and other old-fashioned festival games), Ryugujo Station (recreating a retired Isumi Railway train car, with a driver's-seat experience and a giant Plarail train set), Animal Resort NOAH (a zoo on a tidal flat), and Mikazuki Strawberry Park.
Communal Bath
A communal bath with an open-air bath overlooking the sea and a variety of tubs. Note: since March 20, 2026, hot spring (onsen) supply has been suspended for emergency maintenance of the hot spring equipment (the communal bath itself remains open as usual; the resumption date is undecided). The open-air bath at the Spa Wing's men's communal bath, "Ryugu no Yu," is partly closed.
Guest Rooms
All rooms have their own bath and toilet; in-room bathtubs use regular tap water, not onsen water. Room types include the Standard Room (about 34 sq m, sleeps up to 4), the Special Room (about 50 sq m, sleeps up to 6), Deluxe Ocean and Deluxe Theater rooms, and Colorful Standard rooms, among others. There is also a wide variety of theme rooms: kids' themed rooms (ocean, forest, and sky themes with a climbing wall, jungle gym, and educational toys), railway and bus rooms (Kominato Railway, Isumi Railway, steam-locomotive rooms, and more), a Chiba Lotte Marines room, and the Phiten Room (6th floor), which uses Phiten technology.
Other Services
Ryugutei has a Kids Amenity Bar (rental items available on request). A humidifying air purifier and a water server (room-temperature water) are provided in every room. Fireworks displays (every Friday, Saturday, and Sunday at 8:30 p.m.) are also popular.
Access & Information
| location_onAddress | 1 Kitahama-cho, Kisarazu-shi, Chiba 292-0006 |
|---|---|
| directions_carAccess | About 5 minutes from the Kisarazu-Kaneda IC on the Tokyo Bay Aqua-Line. A free shuttle bus runs from JR Kisarazu Station and the Kaneda Highway Bus Terminal. |
| trainNearest station | Kisarazu Station |
| local_parkingParking | Free for overnight guests. For day-use spa visitors, free for the first 5 hours, then JPY 300 per hour after that (tax included). |
| callPhone | +81-438-41-8111 |
| paymentsCards | VISA, JCB, American Express, Diners Club, UC, DC, NICOS, Mastercard |
| languageOfficial site | https://www.mikazuki.co.jp/ryugujo/open_in_new |
Reference price as of August 15, 2026 (stay date 2026-09-05). Please check the booking site for actual rates.
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Frequently Asked Questions
Is the onsen (hot spring) at the communal bath currently available?
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Partially affected. Since March 20, 2026, hot spring water supply to some tubs in the communal bath has been suspended for emergency equipment maintenance, though the communal bath itself remains open as usual; the open-air bath at the Spa Wing's men's communal bath "Ryugu no Yu" is also partly closed. The resumption date has not been announced, so please confirm the latest status with the hotel before your stay. Note that in-room bathtubs use regular tap water, not onsen water.
Are there pools for kids, and is there a minimum age?
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There is no minimum age limit for using the pools. Two dedicated kids' pools are 30 cm and 40 cm deep, and the indoor Aqua Park has a water slide and runs year-round; the outdoor Garden Pool (a 250-meter lazy river) is open in summer only, June 13 to September 27, 2026. Children who are not yet toilet-trained are asked to wear swim pants (a swim diaper) along with their swimsuit.
What amenities are available for babies and toddlers?
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The hotel lists baby soap, a microwave, a nursing cushion, and a diaper pail, among other items, though descriptions of these amenities vary across the official website - please confirm details with the hotel before booking. Ryugutei's Kids Amenity Bar also offers a rental corner of handy items for families with babies and toddlers, including children's amenities such as animal-motif toothbrushes, on a first-come, limited-quantity basis.
Are there family or theme rooms suitable for kids?
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Yes. Ryugutei offers a variety of kids' concept and theme rooms, including ocean-, forest-, and sky-themed rooms with a climbing wall, jungle gym, and educational toys; railway- and bus-themed rooms (Kominato Railway, Isumi Railway, steam locomotive, and more); a Chiba Lotte Marines room; and a Japanese-Western style room on the 1st floor combining twin beds with a 4-tatami-mat Japanese-style area.
How do you get to the hotel, and is parking free?
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It's about 5 minutes from the Kisarazu-Kaneda IC on the Tokyo Bay Aqua-Line, and a free shuttle bus runs from JR Kisarazu Station and the Kaneda Highway Bus Terminal. Parking is free for overnight guests; for day-use spa visitors it's free for the first 5 hours and then JPY 300 per hour after that (tax included).
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Information on this page was compiled by directly consulting Official website, Rakuten Travel, Jalan (last verified: August 2026). Prices, availability and seasonal operations change — please check each booking site for the latest information.
We take care to keep information accurate, but always confirm the latest details on the hotel's official site and booking sites before you book or visit.