[3] Pasmo is a development of the Passnet system used by many non-JR railway lines in the Greater Tokyo Area.

On April 11, 2007, it was announced that sales of Pasmo fare cards would be limited to commuter rail pass purchases until August due to extremely high demand.

Due to depleting stock, regular Pasmo card sales were suspended and only commuter passes were sold.

[6] Through collaboration with JR East, passengers became able to use Pasmo interchangeably with Suica to ride nearly any railway, metro, or bus in the Tokyo metropolitan area in 2007.

In 2013, interoperation was extended country-wide, and Pasmo became usable across Japan as part of the Nationwide Mutual Usage Service.