Quest TOKYO METRO The Underground Mysteries

Thank you for choosing to ride with Tokyo Metro. This year, we've had the pleasure of placing new mysteries around the city of Tokyo. Why have we done this? Simply because we want you to look at the streets of Tokyo. You've been looking at them? Well, you haven't been looking carefully enough. There are many aspects of Tokyo that even Japanese haven't seen before, hidden all around you.
Go ahead and solve all the mysteries and puzzles we've placed around Tokyo. The easiest way to do this is, of course, to travel using the Tokyo Metro.