hmm Sory if I don't have the specific information, but is it a small tripod? They tend to not allow the use of professional tripods in touristic spots.
Here's some more information on that spot:
https://planetyze.com/en/japan/tokyo/world-trade-center-building-observation-deck
These pictures were taken using tripods.
Perhaps you could call them to find out: Tel: 81-3-3435-6026