Tokyo Tower is a real time commitment — fit it in only if it's a priority.
Allow 1–1.5 hrs.
It's shorter and less of a 'view' than Skytree, but the tower itself is the photo — that orange lattice glowing at night is pure old-Tokyo postcard. Inside it's a bit dated and touristy, so most people enjoy it more from the street and parks below than from the deck.