Osaka rewards hunger more than a third identikit observation deck. Eat first. Then the keep.
Walk Osaka Castle park
The keep is a museum reconstruction. The moat and blossom are why people photograph it. Go in the morning; Dotonbori is the night.
Dotonbori after dark
Takoyaki, okonomiyaki, the mechanical crab. This is the street. Kushikatsu in Shinsekai if you want the older version.
Kuromon in the morning
Wagyu bites, tamagoyaki, fruit that costs a small fortune. A graze, not a supermarket shop.
Umeda Sky Building
Twin towers and a floating garden at 170 m. Useful when rain cancels the castle lawn.
Namba Yasaka and Shinsaibashi
The lion-head hall for a photograph, then the covered arcade if you still have shopping legs.