Some type 51 cars were transferred to Okayama Tram Depot when electrification in Okayama region (Kamigori-Kurashiki section, Okayama-Uno section) was completed in October 1960, and type 70 cars and Kuha type 68 cars were transferred when electrification of the Shinetsu Line in Niigata was completed in May 1962.
1960年10月の岡山地区の電化（上郡～倉敷、岡山～宇野間）に伴い、51系の一部が岡山電車区に転出したほか、1962年5月の信越本線新潟電化の際には70系とクハ68が転出している。