[godwine]

Nothing specific to Tokyo, but in general. You have to think about 3 different aspect of game design, each of them require a different discipline and expertise

- Story design - Beats me, I guess any specific discipline that teach you how to write or how to write interesting story

- Character, object and scene design - Graphic Art and Graphic Design

- Overall game development - Computer Science or Computer Engineering

So when you say "Video Game Design", you need to know which area of video game you want to get into first. Most games these days are driven by something call a Game Engine (features, physics calculation etc), if you want to be doing this type of work, you probably need to achieve a Master degree in Computer Engineering, specifically in the area of Virtual Space engineering.

Good luck