If you want to see the city view of Tokyo from above for free, (not like Tokyo Tower or Tokyo Skytree) then your option is the Tokyo Metropolitan Government Building!
The Tokyo Metropolitan Government Building has a height of 243 meters. If you enter the building, go to the elevators – there’s an extra elevator that only goes to floor 45,which is free of charge!
You can look out of the windows and enjoy the view of beautiful Tokyo. There are even gift stores and Cafes! So amazing, I wish I’d have spent more time there.
Unfortunately, there were some clouds at the horizon, orherwise I would have spotted Mount Fuji!