Two new two-car Aoimori 703 series EMUs were delivered in November 2013 and introduced from the start of the 15 March 2014 timetable revision.
Dua rangkaian dua gerbong KRL Aoimori seri 703 dikirimkan pada bulan November 2013 dan diperkenalkan pada revisi jadwal perjalanan 15 Maret 2014.