Onarimon StationOnarimon Station is a subway station on the Toei [Mita Line] in Minato, Tokyo, Japan, operated by the Tokyo subway operator Tokyo [Metropolitan Bureau of Transportation].LinesOnarimon Station is served by the Toei Mita Line, and is numbered "I-06".Station layoutThe station has one island platform serving two tracks on the second basement level.HistoryThe station opened on 27 November 1973.