The station has one
island platform serving two tracks on the second basement ("B2F") level. {{jpf|pfn=1|first=2|name=Mita Line|symbol=|dir={{plainlist| • for and • for and •
Sotetsu Main Line for via the Tokyu/Sotetsu Shin-Yokohama Line •
Sotetsu Izumino Line for via the Tokyu/Sotetsu Shin-Yokohama Line Toei-subway-I06-Onarimon-station-platform-20240812-115546.jpg|The platform in August 2024 ==History==