Pasmo is a rechargeable contactless smart card electronic money system. It is primarily used for public transport in Tokyo, Japan, where it was introduced on 18 March 2007. Pasmo can also be used as a payment card for vending machines and stores. In 2013, Pasmo became usable in all major cities across Japan as part of the Nationwide Mutual Usage Service.

Two rapid transit systems operate in Tokyo: Tokyo Metro and the Toei Subway. Most of the network is located in the 23 special wards, with portions extending into Chiba and Saitama Prefectures. The subways are one part of Greater Tokyo's passenger rail network, with through service further connecting the subway to suburban railways in Western Tokyo and Kanagawa Prefecture.