Onarimon 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 (Toei).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 ("B2F") level.HistoryThe station opened on 27 November 1973.