Under such circumstances, the Osaka Railway Bureau transferred most of the type 70 cars to Ogaki Transportation Depot when the Chuo Main Line was electrified in Mizunami City (Saha 58 cars were transferred to Okayama) in the following year while receiving many second-hand type 72 cars from the Keihin-Tohoku Line, and enforced the transport capacity during rush hours at the expense of the number of seats to be provided to passengers during the daytime.
こうしたことから翌年の中央本線瑞浪電化で70系をほとんど根こそぎ大垣運輸区に転出させた一方で（サハ58は岡山に転出）、代わりに京浜東北線から大量の中古72系を受け入れて、昼間時の着席サービスを犠牲にすることでラッシュ時の輸送力増強を図った。