The Ginza Line, the first subway line in Asia, opens in Tokyo, Japan.

The Tokyo Metro Ginza Line is a subway line in Tokyo, Japan, operated by Tokyo Metro. The official name is Line 3 Ginza Line . It is 14.3 km (8.9 mi) long and serves the wards of Shibuya, Minato, Chūō, Chiyoda, and Taitō. It is the oldest subway line in Asia, having opened in 1927.

Rapid transit or mass rapid transit (MRT) or heavy rail, commonly referred to as metro, is a type of high-capacity public transport that is generally built in urban areas. A grade separated rapid transit line below ground surface through a tunnel can be regionally called a subway, tube, metro or underground. They are sometimes grade-separated on elevated railways, in which case some are referred to as el trains – short for "elevated" – or skytrains. Rapid transit systems are usually electric railways that, unlike buses or trams, operate on an exclusive right-of-way, which cannot be accessed by pedestrians or other vehicles.