noun
Tōbu Tōjō Line
Proper noun: a railway line operated by Tōbu Railway in the Greater Tokyo Area, running from Ikebukuro to Yorii.
東武東上線で池袋から川越まで行きます。
I go from Ikebukuro to Kawagoe on the Tōbu Tōjō Line.
Named after the railway company (東武, Tōbu) and the historical Tōjō region (東上, Tōjō) it serves, with 線 (line).