Like many transport hubs, Tokyo station is in constant motion - a nucleus centre of transport lifelines winding seamlessly through the spaces and filled with people who all seem to know exactly where to go.
The workers gotta work, the tourists gotta tourist and if you don't know your north from south (yet), you better get out of the way or at least head on purposefully to the information booths to find out.
Be prepared to pay attention and do some emergency sidestepping. And perhaps practice the art of gracefully maneuveuring your giant, awkward suitcase (with large soft bag on top) in all directions without running into people too often.
