It connects Futamata-gawa in Yokohama to Shōnandai in Fujisawa.

On February 27, 1999, Rapid service trains started operation.

[2] Effective this date, through services from Shonandai continue past Hiyoshi on the Tokyu Shin-yokohama Line towards Wakoshi on the Yurakucho Line.

A westward extension from Shōnandai to Kurami Station on the JR East Sagami Line has been proposed.

One of the station is to be built near the Keio University Shonan Fujisawa Campus.