Garden Pool at Hotel New Otani (2015)

Forget you’re in the big city at the New Otani’s expansive (and expensive!) outdoor pool, decorated like a tropical resort and featuring a fun poolside restaurant serving Hawaiian-style burgers and fruity cocktails. The opening hours are extended at the height of summer, giving you a chance to swim in the lit-up pool until 10pm or hang out on the lawn while sipping on a drink and taking in some mellow DJ tunes. And if you have a little extra cash to throw away, try renting one of the cabanas, available for a cool ¥80,000 per couple.