Shinjohara Station is a railway station in Kosai, Shizuoka, Japan, on both the Tōkaidō Main Line and the Tenryū Hamanako Line The station is 282.4 kilometers from Tokyo Station and is a terminal station for the Tenryū Hamanako Line. The station serves both Kosai, and a portion of Toyohashi. The border between Shizuoka Prefecture and Aichi Prefecture bisects the platform of Shinjohara Station.