The is a section of the Eastern Kanagawa Rail Link project which connects the Sōtetsu Main Line to the JR East Saikyō Line via the tracks of the Sōtetsu Shin-Yokohama Line and the Tōkaidō Freight Line. It was constructed and is owned by the Japan Railway Construction, Transport and Technology Agency (JRTT). The service and operations are publicly described as by JR East,（JR線代表的駅構内図） and as by Sagami Railway (Sotetsu).（相鉄線代表的駅構内案内）
History
Past proposals Past proposals also suggested Sōtetsu trains operate through services with the Ueno-Tokyo Line, towards the Utsunomiya, Takasaki and Jōban Lines. This would have required trains to cross over level junctions to enter the Tōkaido Line tracks near Tsurumi or Shinagawa (or somewhere in between), which would have possibly undermined the high-density train operations in this section, if no dedicated grade separation were to be built. Thus, the idea was scrapped due to these difficulties. Services JR through service trains enter the Tōkaido Freight Line once leaving Hazawa Yokohama-Kokudai Station, via the Tokyo side of Yokohama-Hazawa Freight Station, then enter the Yokosuka Line tracks near Tsurumi Station. The service shares the same route as the Shōnan–Shinjuku Line, heading inbound towards Musashi-Kosugi, Ōsaki, Shibuya, and Shinjuku.
Trains operate from Ebina on the Sōtetsu Main Line via Nishiya and Musashi-Kosugi, and enter the Saikyō Line at Ōsaki. Trains generally terminate at Shinjuku. During the morning rush hour, some trains go further north towards Musashi-Urawa, Ōmiya, Sashiōgi (where the Kawagoe Line depot is located), and as far as Kawagoe. A total of 46 round trips are operated every day, with a rush hour frequency of 4 trains per hour, and off-peak frequency of 2–3 trains per hour.
The fastest travel times are 44 minutes between Futamatagawa and Shinjuku, 45 minutes between Yamato and Shibuya, and 36 minutes between Ebina and Musashi-Kosugi.
Service types
Local (各停), stopping at all stations Limited Express (特急), stopping at all stations on the JR lines. However, when Limited Express trains are on the JR line, they are displayed as Local instead.
Nomenclature Ebina Station...Futamatagawa Station...Nishiya StationHazawa yokohama-kokudai StationTsurumi StationShin-Tsurumi Signal Station...Ōsaki StationShinjuku StationLine name in passenger info→Through service to JR Saikyo LineThrough service to Saikyo (Kawagoe) LineSaikyo (Kawagoe) Line←Sotetsu LinesThrough service to Sotetsu LinesThrough service to Saikyo Line Sotetsu LineOfficial route nameSotetsu Main LineSotetsu Shin-Yokohama LineTōkaidō Main LineYamanote LineTrack nameTokaido Freight LineHinkaku LineYamanote Freight Line
Station list CompanyLine nameNo.StationJapaneseTransfersLocationThrough service to , on and JR EastYamanote Line新宿ShinjukuTokyoShibuya渋谷恵比寿大崎ShinagawaTōkaidō Main Line西大井武蔵小杉Nakahara-ku, KawasakiKanagawa羽沢横浜国大 (SO51; for )Kanagawa-ku, YokohamaSagami Railway (Sotetsu)Sōtetsu Shin-Yokohama Line西谷 (SO08; for )Hodogaya-ku, YokohamaSōtetsu Main Line二俣川 (SO10)Asahi-ku, Yokohama大和 (OE05)Yamato海老名Ebina
References