Oiso Prince Hotel
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.