History
Kiba Station opened on 14 September 1967 with the original Tōzai Line. It was the first Tokyo Metro station built using shield tunnelling, and remains the line's deepest, with its island platform some 22.4 metres below ground. The single-track shield bores between Monzen-Nakachō and Tōyōchō were driven by hand-shield machines through the soft soils of the former timber yards. Privatisation transferred the station to Tokyo Metro on 1 April 2004, and PASMO acceptance began in March 2007. A 2015 "Tokyo Metro Plan" widening from 3 m to 12 m of platform was paused in 2022 after only 3.5 m of the planned 26 m of excavation, when COVID-19 ridership losses prompted a temporary fill-back.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
An ambitious plan to widen the island platform from 3 m to 12 m by removing the shield tunnel around the live tracks was paused in 2022 after pandemic ridership losses, with only 3.5 m of the planned 26 m excavated.