Hotel New Otani Osaka (525) - Castle-Side Grand Retreat

The Ho-oh Ballroom offers 2,380 m² (up to 3,000 pax) and a rooftop garden looking straight at Osaka Castle—ideal for keynote + fireworks-gala combos. Nakanoshima Convention Ctr. is 5 min by shuttle; JR Osaka-jō Kōen Station is 3 min on foot, and direct airport limos halve transfer stress for 500-plus delegates. Twenty meeting rooms, 525 guest rooms and a riverside jogging route let organisers stack plenaries, break-outs and wellness easily.

Sunrise colours the castle’s stone walls outside bedroom windows; at night the rooftop garden frames the illuminated keep like a floating stage. Guests can whisk matcha in tea room “Juraku-an”, dine on wagyu sukiyaki with castle views, then watch summer hanabi burst over the moat—an only-in-Osaka memory that blends samurai history with modern spectacle.