The SÃ Âtetsu Shin-Yokohama Line is a commuter line operated by Sotetsu between Nishiya Station on the SÃ Âtetsu Main Line to Shin-Yokohama Station. SÃ Âtetsu has put its company names as a formal part of the line names, which is a first for the company.
It is a part of the Eastern Kanagawa Rail Link strategic plan for improving the rail network connectivity of Kanagawa Prefecture. The rail infrastructures of this line are maintained by the Japan Railway Construction, Transport and Technology Agency (JRTT). SÃ Âtetsu collects the operation revenue and pays JRTT for using the rail infrastructures, then JRTT use this payment to maintain the infrastructures and reimburse the loan for the construction of this line.
The SÃ Âtetsu Shin-Yokohama Line opened on 30 November 2019 and the extension to Shin-Yokohama opened on 18 March 2023.
Sà Âtetsu Main Line and Sà Âtetsu Izumino Line trains operates through services with JR East via Hazawa Yokohama Kokudai; and planned through service with Tà Âkyà «, Toei Subway Lines via Hiyoshi. The former is named the Sà Âtetsu JR Link Line. Moreover, Sà Âtetsu has been promoting the project as the "Metropolitan Through Service Project" (é½å¿Âç´éÂÂãÂÂãÂÂã¸ã§ã¯ãÂÂ), as the link will enable connection from eastern Kanagawa into central Tokyo, and further north towards Saitama.
The new facilities at Shin-Yokohama Station are jointly operated by Sà Âtetsu and Tà Âkyà «. This is the first case for both operators to have a station with direct connections to the Shinkansen.
Tà Âkyà « through service trains enter the Tà Âkyà « Line network from Shin-Yokohama, and continue towards Shibuya via the Tà Âkyà « Tà Âyoko Line or Meguro via Tà Âkyà « Meguro Line. Trains from Ebina run to the Meguro Line as express trains, while trains from station on the Izumino Line run onto the Toyoko Line.
Sà Âtetsu has introduced its 20000 series which is to be used in Tà Âkyà « through services, and has been in service since February 2018. The 20000 series will be produced in 10-car sets and 8-cars, with the 10-car sets not entering the Tà Âkyà « Meguro Line and the Toei Mita Line. Moreover, the 20000 series is not intended to be used on JR through services.
The station numbers for the SÃ Âtetsu Shin-Yokohama Line's Shin-Yokohama station was revealed on 16 September 2022.
As of November 2022, various trainsets from Sà Âtetsu, Tà Âkyà «, Tokyo Metro, Toei, and Tà Âbu have been conducting tests along the now completed segment of this line and the Tà Âkyà « Shin-Yokohama Line between Hiyoshi and Hazawa Yokohama-Kokudai.
On 16 December 2022, Sà Âtetsu, Tà Âkyà «, and the Japan Railway Construction, Transport and Technology Agency announced that the Sà Âtetsu Shin-Yokohama Line's extension to Shin-yokohama will open on 18 March 2023. The Shin-Yokohama Line opened as scheduled on 18 March 2023, providing through service between Shin-yokohama and Hiyoshi.