Tohoku · Fukushima · Iwaki
Spa Resort Hawaiians (Hotel Hawaiians & official hotels)
Multiple waterslides centered indoors, including Mauna Black (131 m long, 17.5 m drop), Kapuani Fall, and Raki River.
Summer outdoor slide parks
Long outdoor slides and summer water parks. Seasons change every year— confirm opening dates officially. 22 listed · Ad
Tohoku · Iwate · Hanamaki
Yunomori Hotel Shidotaira
Waterslide over 90 m long connecting indoor heated and outdoor pools (summer). Indoor pool itself runs on a year-round calendar.
Tohoku · Fukushima · Atami-machi, Koriyama
Bandai Atami Onsen Hotel Hananoyu
25 m outdoor pool with a waterslide, plus a kids pool (50 cm deep).
Kanto · Chiba · Kisarazu
Ryugujo Spa Hotel Mikazuki Ryugutei
Year-round indoor aqua park with ~70 m waterslide. Garden pool and more open in summer.
Kanto · Tochigi · Kinugawa Onsen, Nikko
Nikko Kinugawa Hotel Mikazuki
Indoor Garden Spa waterslide ~20 m long with ~4 m drop, plus current pools. Rooftop pool in summer.
Kanto · Kanagawa · Oiso, Naka District
Oiso Prince Hotel
Attached/adjacent Oiso Long Beach has two ~140 m waterslide courses (A 139 m / B 140 m) plus kids slides.
Chubu · Aichi · Toyohashi
Hotel Sea Palace Resort
Sea Palace Rainbow Pool (summer) with two waterslides, wave/current, and toddler pools.
Chubu · Niigata · Myoko
Hotel Green Plaza Joetsu
Joetsu Kokusai Playland Water Park with water bobsleds (150 m / 100 m), Wonderful Slider, Balloon Slider, and more.
Chubu · Mie · Kuwana
Hotel Nagashima
Nagashima Resort “Jumbo Saltwater Pool” with many large waterslides (e.g. Mega Abyss). Guest pool tickets available. Indoor kids spa area too.
Kansai · Hyogo · Miki
Nesta Resort Kobe
Water Fort with 6 pools and 12 slide types (summer). Indoor kids pool available.
Kansai · Hyogo · Sumoto
Hotel New Awaji
Seaside pool with a slide (summer). Group hotel Shimahana lists a waterfall slide pool and more.
Shikoku · Kagawa · Ayauta, Marugame
Hotel Leoma no Mori
Adjacent NEW Reoma World “Reoma Water Land” has tube, body, and waterslides (e.g. 43 m) plus kids slides.
Kyushu · Oita · Kannawa-ji area, Beppu
Beppu Onsen Suginoi Hotel
All-weather amusement pool “Aqua Beat” with 4 slides (~76–126 m). Kids pool has an elephant slide.
Kyushu · Nagasaki · Shimabara
Shimabara Onsen Hotel Nampuro
Kids pool (50 cm deep, 8 m diameter) with a water slide. Pool season runs summer into autumn.
Okinawa · Okinawa · Onna, Kunigami District
Sheraton Okinawa Sunmarina Resort
Garden pool with The Tornado (83 m) and The Twister (31 m). Indoor pool also has kids-slide mentions (secondary).
Okinawa · Okinawa · Mashiki, Ginowan
Laguna Garden Hotel
All-weather indoor pool with a mini waterslide (kids-oriented). Large outdoor pool, but the slide focus is the indoor mini.
Okinawa · Okinawa · Yomitan, Nakagami District
Grand Mercure Okinawa Cape Zanpa Resort
Three slides: Ultra Boomerang, Hyper Snake (86 m), Super Snake (62 m). Heated areas available.
Okinawa · Okinawa · Onna, Kunigami District
Hotel Monterey Okinawa Spa & Resort
Sunset Garden kids slider pool (~4.2 m; ~60 cm depth often cited secondarily). Wave and infinity pools also.
Okinawa · Okinawa · Nago
Oriental Hotel Okinawa Resort & Spa
Garden pool waterslide (official notices; secondary sources cite 47.5 m length).
Okinawa · Okinawa · Ishigaki
Fusaki Beach Resort Hotel & Villas
Aqua Garden Splash Park with one of Ishigaki’s largest waterslides. Indoor pool side also lists slides.
Okinawa · Okinawa · Onna, Kunigami District
Renaissance Resort Okinawa
Indoor pool with a 5 m high waterslide plus a 15 m loop slide. Outdoor kids area and splash plaza.
Chubu · Mie · Kuwana
Hotel Hanamizuki (Nagashima Resort)
Official Nagashima Resort hotel. Main access is to Jumbo Saltwater Pool’s large slide complex. Onsen-ryokan style rooms.
| Hotel | Region | Indoor | Year-round | Slide summary | Book Ad |
|---|---|---|---|---|---|
| Spa Resort Hawaiians (Hotel Hawaiians & official hotels) Fukushima · Iwaki | Tohoku | Yes | Yes | Multiple waterslides centered indoors, including Mauna Black (131 m long, 17.5 m drop), Kapuani Fall, and Raki River. | Compare & book |
| Yunomori Hotel Shidotaira Iwate · Hanamaki | Tohoku | Yes | Seasonal | Waterslide over 90 m long connecting indoor heated and outdoor pools (summer). Indoor pool itself runs on a year-round calendar. | Compare & book |
| Bandai Atami Onsen Hotel Hananoyu Fukushima · Atami-machi, Koriyama | Tohoku | — | Seasonal | 25 m outdoor pool with a waterslide, plus a kids pool (50 cm deep). | Compare & book |
| Ryugujo Spa Hotel Mikazuki Ryugutei Chiba · Kisarazu | Kanto | Yes | Yes | Year-round indoor aqua park with ~70 m waterslide. Garden pool and more open in summer. | Compare & book |
| Nikko Kinugawa Hotel Mikazuki Tochigi · Kinugawa Onsen, Nikko | Kanto | Yes | Yes | Indoor Garden Spa waterslide ~20 m long with ~4 m drop, plus current pools. Rooftop pool in summer. | Compare & book |
| Oiso Prince Hotel Kanagawa · Oiso, Naka District | Kanto | — | Seasonal | Attached/adjacent Oiso Long Beach has two ~140 m waterslide courses (A 139 m / B 140 m) plus kids slides. | Compare & book |
| Hotel Sea Palace Resort Aichi · Toyohashi | Chubu | — | Seasonal | Sea Palace Rainbow Pool (summer) with two waterslides, wave/current, and toddler pools. | Compare & book |
| Hotel Green Plaza Joetsu Niigata · Myoko | Chubu | — | Seasonal | Joetsu Kokusai Playland Water Park with water bobsleds (150 m / 100 m), Wonderful Slider, Balloon Slider, and more. | Compare & book |
| Hotel Nagashima Mie · Kuwana | Chubu | Yes | Seasonal | Nagashima Resort “Jumbo Saltwater Pool” with many large waterslides (e.g. Mega Abyss). Guest pool tickets available. Indoor kids spa area too. | Compare & book |
| Nesta Resort Kobe Hyogo · Miki | Kansai | Yes | Seasonal | Water Fort with 6 pools and 12 slide types (summer). Indoor kids pool available. | Compare & book |
| Hotel New Awaji Hyogo · Sumoto | Kansai | — | Seasonal | Seaside pool with a slide (summer). Group hotel Shimahana lists a waterfall slide pool and more. | Compare & book |
| Hotel Leoma no Mori Kagawa · Ayauta, Marugame | Shikoku | Yes | Seasonal | Adjacent NEW Reoma World “Reoma Water Land” has tube, body, and waterslides (e.g. 43 m) plus kids slides. | Compare & book |
| Beppu Onsen Suginoi Hotel Oita · Kannawa-ji area, Beppu | Kyushu | Yes | Seasonal | All-weather amusement pool “Aqua Beat” with 4 slides (~76–126 m). Kids pool has an elephant slide. | Compare & book |
| Shimabara Onsen Hotel Nampuro Nagasaki · Shimabara | Kyushu | — | Seasonal | Kids pool (50 cm deep, 8 m diameter) with a water slide. Pool season runs summer into autumn. | Compare & book |
| Sheraton Okinawa Sunmarina Resort Okinawa · Onna, Kunigami District | Okinawa | Yes | Seasonal | Garden pool with The Tornado (83 m) and The Twister (31 m). Indoor pool also has kids-slide mentions (secondary). | Compare & book |
| Laguna Garden Hotel Okinawa · Mashiki, Ginowan | Okinawa | Yes | Yes | All-weather indoor pool with a mini waterslide (kids-oriented). Large outdoor pool, but the slide focus is the indoor mini. | Compare & book |
| Grand Mercure Okinawa Cape Zanpa Resort Okinawa · Yomitan, Nakagami District | Okinawa | — | Yes | Three slides: Ultra Boomerang, Hyper Snake (86 m), Super Snake (62 m). Heated areas available. | Compare & book |
| Hotel Monterey Okinawa Spa & Resort Okinawa · Onna, Kunigami District | Okinawa | Yes | Seasonal | Sunset Garden kids slider pool (~4.2 m; ~60 cm depth often cited secondarily). Wave and infinity pools also. | Compare & book |
| Oriental Hotel Okinawa Resort & Spa Okinawa · Nago | Okinawa | Yes | Seasonal | Garden pool waterslide (official notices; secondary sources cite 47.5 m length). | Compare & book |
| Fusaki Beach Resort Hotel & Villas Okinawa · Ishigaki | Okinawa | Yes | Seasonal | Aqua Garden Splash Park with one of Ishigaki’s largest waterslides. Indoor pool side also lists slides. | Compare & book |
| Renaissance Resort Okinawa Okinawa · Onna, Kunigami District | Okinawa | Yes | Yes | Indoor pool with a 5 m high waterslide plus a 15 m loop slide. Outdoor kids area and splash plaza. | Compare & book |
| Hotel Hanamizuki (Nagashima Resort) Mie · Kuwana | Chubu | Yes | Seasonal | Official Nagashima Resort hotel. Main access is to Jumbo Saltwater Pool’s large slide complex. Onsen-ryokan style rooms. | Compare & book |