Oiso Long Beach

Fashioned in the style of a tropical holiday resort, this water park on the Shonan coastline offers a seaside experience without you actually having to venture into the sea. The facilities at Oiso Long Beach are aimed more at young families than thrill-seekers: while the latter may find the lone water slide rather tame, kids are sure to enjoy the wave pool, diving boards and 500m, lazy river-style pool at the centre of the park.