The station is on a raised viaduct running in a roughly north-south direction. There are two exits, the north exit and south exit. Both exits have ticket vending machines and toilets; however, the north exit has a Midori no Madoguchi staffed ticket office and escalators to the platforms. Luggage lockers are available at the south exit.
Platforms
The station has two island platforms with two tracks on either side of each platform. Platforms 1 and 4 serve the Keihin-Tohoku Line, while platforms 2 and 3 are used for Yamanote Line trains. 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.
Adjacent stations
History
The station opened on 1 November 1925. Waist-high platform edge doors were installed on the Yamanote Line platforms in March 2014, scheduled to be brought into operation from 10 May. From 14 March 2015, rapid services on the Keihin-Tohoku Line began serving the station on weekends and national holidays only.
Passenger statistics
In fiscal 2013, the station was used by an average of 67,593 passengers daily, making it the 64th-busiest station operated by JR East. The daily average passenger figures in previous years are as shown below.
Fiscal year
Daily average
2000
79,539
2005
77,011
2010
69,565
2011
68,402
2012
67,737
2013
67,593
Surrounding area
Okachimachi Station is in the centre of a busy commercial district stretching southwards from Ueno Station. Particularly well-known is Ameya-Yokochō, a busy shopping street dominated by small market-style stalls selling a wide variety of wares. Ameyoko runs parallel to the railway line and includes a large market under the railway tracks.
