High Quality Content by WIKIPEDIA articles! The Odaky Odawara Line ( , Odaky -odawara-sen) is the main line of Japanese private railway operator Odaky Electric Railway. It stretches 82.5 km from Shinjuku in central Tokyo through the southwest suburbs to the city of Odawara, the gateway to Hakone in Kanagawa Prefecture. It is a heavy commuter line and is also known for its "Romancecar" limited express services. From Yoyogi-Uehara Station some trains continue onto the Tokyo Metro Chiyoda Line and beyond to the East Japan Railway Company J ban Line.