Japan has one of the most extensive and developed railway transportation systems in the world. The railway shapes Japan, quite literally, and nowhere is this more true than in Tokyo. The metropolitan network can be daunting at first sight, but its well-planned, organized structure eventually comes to serve as a cheat sheet for knowing the city. Every train line is represented by its own colour. For me, upon a glance, the colourful outlines of the railway map suggest branching, delicate arteries that feed the rhythmic vibrations of this city and its inhabitants. Through a digital art creation process, I traced and overlaid all the lines of the railway to make the shape of a human heart, my perception of Tokyo.