Long outdoor slides and summer water parks. Seasons change every year— confirm opening dates officially. 6 listed · Ad
Hokkaido, Hokkaido · Year-round
Indoor 造波プール (wave pool) with shallow front / deeper back; waves about every 15 minutes. Same complex has ~84 m aqua coaster. Separate summer outdoor Super Jumbo Pool also on site.
Indoor option
Indoor / all-weather facilities noted for this stay.
Year-round oriented
Facilities aimed at year-round use (confirm maintenance closures).
Outdoor spaces
Outdoor areas listed — check season and weather.
Kanto, Kanagawa
Oiso Long Beach summer complex: dedicated 波のプール (wave pool) with waves ~0.3–0.8 m, depth 0–1.4 m (kids zone 0–0.6 m), plus ~500 m lazy river and ~140 m tube waterslides.
Outdoor spaces
Outdoor areas listed — check season and weather.
family
Waterslide typically 120 cm+ / age 6+. Kids paradise for younger children.
Official confirmation
Hours and fees change — verify on the official site.
Chubu, Aichi
Sea Palace Rainbow Pool (summer outdoor): official page lists 造波プール (wave pool) plus two waterslides, flowing pool, and toddler pool.
Outdoor spaces
Outdoor areas listed — check season and weather.
family
Age 1 and under free entry. Confirm slide height rules on site.
Official confirmation
Hours and fees change — verify on the official site.
Chubu, Mie
Nagashima Resort Jumbo Seawater Pool: official Surfing Pool (~5,000 m²) with three wave machines (造波器) creating ocean-like waves, depth 0–1.6 m, plus Music Splash. Hotel Nagashima is an official resort hotel with guest pool-ticket benefits.
Outdoor spaces
Outdoor areas listed — check season and weather.
family
No special height limit listed for surfing/wave pool itself; slides elsewhere have limits.
Official confirmation
Hours and fees change — verify on the official site.
Kyushu, Oita
Aqua Beat leisure pool: Aqua Beach is listed as a 造波プール (wave pool) by Mapple/JTB—seawater-mood beach waves—plus Mystery Dock flowing pool and four long body slides (~76–126 m).
Indoor option
Indoor / all-weather facilities noted for this stay.
Outdoor spaces
Outdoor areas listed — check season and weather.
family
Slides typically 120 cm+. Kids pool for younger children. Confirm seasonal Aqua Beat rules.
Okinawa, Okinawa
Sunset Garden outdoor complex: official rare Okinawa ウェイブプール (wave pool), infinity-style main pool, kids slider pool. Indoor Blue Leaf pools separate.
Indoor option
Indoor / all-weather facilities noted for this stay.
Outdoor spaces
Outdoor areas listed — check season and weather.
family
Elementary / under 130 cm need guardian in main and wave pools. Preschoolers discouraged from main pool. Swim diaper + swimsuit for non-toilet-trained.
| Hotel | Region | Indoor | Year-round | Slide summary | Book Ad |
|---|---|---|---|---|---|
| Rusutsu Resort Hokkaido · Rusutsu | Hokkaido | Yes | Yes | Indoor 造波プール (wave pool) with shallow front / deeper back; waves about every 15 minutes. Same complex has ~84 m aqua coaster. Separate summer outdoor Super Jumbo Pool also on site. | Compare & book |
| Oiso Prince Hotel Kanagawa · Oiso | Kanto | — | Seasonal | Oiso Long Beach summer complex: dedicated 波のプール (wave pool) with waves ~0.3–0.8 m, depth 0–1.4 m (kids zone 0–0.6 m), plus ~500 m lazy river and ~140 m tube waterslides. | Compare & book |
| Hotel Sea Palace Resort Aichi · Toyohashi | Chubu | — | Seasonal | Sea Palace Rainbow Pool (summer outdoor): official page lists 造波プール (wave pool) plus two waterslides, flowing pool, and toddler pool. | Compare & book |
| Hotel Nagashima Mie · Kuwana (Nagashima) | Chubu | — | Seasonal | Nagashima Resort Jumbo Seawater Pool: official Surfing Pool (~5,000 m²) with three wave machines (造波器) creating ocean-like waves, depth 0–1.6 m, plus Music Splash. Hotel Nagashima is an official resort hotel with guest pool-ticket benefits. | Compare & book |
| Suginoi Hotel (Aqua Beat) Oita · Beppu | Kyushu | Yes | Seasonal | Aqua Beat leisure pool: Aqua Beach is listed as a 造波プール (wave pool) by Mapple/JTB—seawater-mood beach waves—plus Mystery Dock flowing pool and four long body slides (~76–126 m). | Compare & book |
| Hotel Monterey Okinawa Spa & Resort Okinawa · Onna | Okinawa | Yes | Seasonal | Sunset Garden outdoor complex: official rare Okinawa ウェイブプール (wave pool), infinity-style main pool, kids slider pool. Indoor Blue Leaf pools separate. | Compare & book |