Osaka
Attractions
Anime Figure Museum

This is at Osaka Castle. It's nothing crazy, but there's some neat dioramas from famous shows like the Neon Genesis one above.
Osaka Castle
It's honestly OK if you don't go in. There tends to be a line, and there's nothing crazy inside. It's mainly a museum about the warring states period, almost entirely in Japanese. It's mainly something to view from the outside.
Universal Studios
To get into Nintendo Land, you need another pass. In general, I would pay2win and buy the addons to save your feet. There's an insane amount of people, even if they're more orderly.
Restaurants
Harukoma
Google Maps
Address: 5 Chome-5-2 Tenjinbashi, Kita Ward, Osaka, 530-0041, Japan
This was honestly the best sushi I've had in Japan. Peak stuff. Usually there's a line, and no reservations. It's a simple countertop setup with maybe 10-12 seats total.