The document provides information about commuter rail systems in several major cities around the world. It discusses the commuter rail networks in Tokyo, Osaka, Nagoya, Paris, and London. The Tokyo system has over 1,800 miles of routes and 1,200 stations on 60 lines, serving over 15 billion rides annually. It is highly integrated with subway and bus networks. The Osaka and Nagoya systems also have extensive commuter rail infrastructure managed privately without government subsidies. Paris and London have over 1,000 miles and 700 stations respectively in their commuter rail networks but with lower frequencies than Tokyo.