東急田園都市線
The line originally was built and opened as a transportation link to the park (which opened in 1965) from the Tōkyū Den-en-toshi Line. The Children's Land Association ("Shakai Fukushi Houjin Kodomonokuni Kyokai") owned the right-of-way and the Kodomonokuni Station, but the actual operation was contracted out to Tokyu Corporation.