Unlike the Odawara line, rarely were pre-World War II Japanese private railways constructed with double-track and fully electrified from the first day of operation.
Tidak seperti jalur kereta api Odawara, jarang sekali jarngan kereta api swasta Jepang sebelum Perang Dunia II dibangun dengan jalur ganda dan dielektrifikasi sejak hari pertama operasional.