is a railway station in Adachi, Tokyo, Japan. It is operated by private railway operator Tobu Railway.
The station is served by the Tobu Skytree Line and Tobu Daishi Line.
The station consists of three island platforms serving six tracks.
The station opened on 27 August 1899.
From 17 March 2012, station numbering was introduced on all Tobu lines, with Nishiarai Station becoming "TS-13".
In fiscal 2024, the station was used by an average of 31,589 passengers daily (boarding passengers only).