Tokyo Gas is the primary provider of city gas—specifically natural gas distributed via extensive underground pipeline networks—to residential, commercial, and industrial customers throughout Tokyo and surrounding prefectures. City gas differs fundamentally from bottled liquefied petroleum gas because it is piped directly to appliances, offering continuous convenience and a cleaner environmental profile. The company oversees the entire operational chain required to deliver city gas safely, ranging from importing liquefied natural gas via massive carrier ships and regasifying it at coastal terminals to maintaining high-pressure transmission networks and local distribution mains beneath urban streets.