The EH10 That Couldn't Go West

Developed to address the surge in freight transportation, the EH10 was the first new electric locomotive after the war.
It excelled in hauling container express trains, but with the advent of new performance EMUs, its role gradually shifted.
While it was expected to expand westward with the electrification of the Tokaido and Sanyo Main Lines, this did not materialize.
Cooperative operation with helper engines at the challenging Seno Hatchi section did not go smoothly, resulting in its regular operation ending at Okayama.
This was the fate of the eight-axle locomotives with resistance control.
References
山陽線瀬野･八本松間の補機用電機形式の選定 JREA 6(3) 日本鉄道技術協会
異形式動力車の協調運転 JREA 5(9) 日本鉄道技術協会
EF59形電気機関車 鉄道工場 14(6)(153)レールウエー・システム・リサーチ
鉄路100万キロ走行記（宇田賢吉著） グランプリ出版
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