is a railway station in Taito, Tokyo, Japan, operated by East Japan Railway Company (JR East).
Lines
Okachimachi Station is served by the circular Yamanote Line and also the Keihin-Tohoku Line. Although not physically connected, on the Tokyo Metro Hibiya Line, on the Tokyo Metro Ginza Line, and on the Toei Oedo Line are within walking distance of Okachimachi and marked as interchanges on route maps.
Station layout
thumb|The station platforms, June 2021
The station is on a raised viaduct running in a roughly north-south direction. There are two exits, the and . This platform arrangement allows for easy cross-platform interchanges so that passengers may transfer between lines in the same direction by walking across the platform.
East of the platforms lie tracks of the Ueno-Tokyo Line. These are themselves built on former tracks of the Tohoku Main Line running to Tokyo Station, that had been used for stabling trains when construction of the Tohoku Shinkansen took over land near Kanda Station previously used by the Tohoku Main Line, forcing services to terminate at Ueno Station instead.
The Yamanote Line platforms are equipped with chest-high platform edge doors, installed in March 2014. From 14 March 2015, rapid services on the Keihin-Tohoku Line began serving the station on weekends and national holidays only.
Station numbering was introduced in 2016 with Okachimachi being assigned station numbers JY04 for the Yamanote line and JK29 for the Keihin-Tōhoku line.
Passenger statistics
In fiscal 2013, the station was used by an average of 67,593 passengers daily (boarding passengers only), making it the 64th-busiest station operated by JR East. The daily average passenger figures (boarding passengers only) in previous years are as shown below.
{| class="wikitable"
|-
! Fiscal year !! Daily average
|-
| 2000|| 79,539
|-
| 2005|| 77,011
|-
| 2010 || 69,565
|-
| 2011 || 68,402
|-
| 2012 || 67,737
|-
| 2013 || 67,593