  is a railway station in shinagawa, tokyo, japan, jointly operated by east japan railway company (jr east) and tokyo waterfront area rapid transit (twr). ==lines== Åsaki station is served by the following jr east lines. * saikyÅ line * shÅnan-shinjuku line * yamanote line it also forms the northern starting point of the twr rinkai line to . most saikyÅ line trains operate through to shin-kiba on the rinkai line. ==station layout== the station has four island platforms serving eight tracks. platforms 1 to 4 are for the yamanote line, and 5 to 8 are shared by the saikyÅ line, the shÅnan-shinjuku line, and the rinkai line. it is one of the stations where trains on the yamanote line loop are put into and taken out of service. therefore, it has four tracks (two in each direction) for that line so as not to interfere with continuing trains (trains go several rounds before being taken out). waist-high platform edge doors were introduced on the yamanote line platforms from 22 december 2012. ===platforms===  {{ja-rail-line|pfn=3-4|nidx=yamanote line|col=yellowgreen|dir=clockwise for , {{ja-stalin
Railway_stations_in_Tokyo Railway_stations_opened_in_1901 SaikyA_Line ShAnan-Shinjuku_Line Stations_of_East_Japan_Railway_Company Stations_of_Tokyo_Waterfront_Area_Rapid_Transit Yamanote_Line