Historical Map: Tokyo Metro Map on a Passnet Fare Card, 2005
Certainly solves the problem of having to read a map over someone’s shoulder on a crowded train (or resorting to wearing one on your tie). Passnet was a magnetic-stripe fare card in use in the Kanto region from 2000 to 2008: it’s since been replaced by the contactless Pasmo card. Source: Rob Ketcherside/Flickr