Tokyo Railway System is a railway map of Tokyo metropolitan area whose overall image is inspired by the circle of the national flag of Japan (Hinomaru). Concentric circling lines spread out to the entire city with the center of the Yamanote line. This map includes more than 1500 stations and more than 100 lines covering not only Tokyo but also the surrounding region of Yokohama, Chiba, Omiya, Hachioji, Kawagoe. This many and complicated lines, and subways to make it easy for visitors to determine which line to take at a glance.

Designed by Korean duo Zero Per Zero. The Mousepad is made from PVC and measures: 8.6x7 inch (220x180mm).