According to our Japanese relatives, Umeda is essentially Osaka's answer to Tokyo's Shinjuku - a massive urban playground packed with endless shopping and dining options. The whole area surrounding Osaka/Umeda stations is a maze of department stores, underground shopping arcades, and skyscrapers filled with restaurants.
What makes it special is how the different levels work together - you can go from underground shopping passages to rooftop observation decks in the same complex. The HEP FIVE building with its iconic red Ferris wheel is particularly fun for kids, while parents appreciate the variety of shopping from luxury brands to local specialties.
They specifically recommended exploring the food floors in the department stores and the restaurant floors in the skyscrapers - apparently each building tries to outdo the others with their dining options. Plus, the major transport connections make it an easy stop whether you're staying in Osaka or just visiting for the day.