The surface of the coffee in my Starbucks cup begins its gentle dance, the signal to lift my head.
No, this is not "Jurassic Park" and the vibration is not due to an approaching T-Rex. It's Takadanobaba and the train station quivers with the force of commuters ripping up the stairway, some no doubt two at a time.
A split second more and I can hear the tromp of their shoes on station floor. In another second the front runners are already tearing past my window.