The Electric Multiple-Unit n age of Japan started.

Japan is a country with much mountainous land. Therefore, operation of railroads using electric power was desirable. However, there was a problem.
Much expense is required for electrification. The army was opposed to electrification of the railroad before the Pacific War. That is because they feared an attack on the power generation equipment. Electrification of the other local routes was only carried out on the section of a long tunnel through a mountain range.
However, electrification of the main Tokaido line progressed after the end of the war. It was the greatest main line in Japan. The Tokaido Shinkansen was still a dream at the time. The main Tokaido line, between Tokyo Station and KOUZU stations was electrified in 1925. However, the other section was not electrified. The economy of Japan collapsed in defeat of the Pacific War.
Therefore, the price of coal jumped up suddenly. Moreover, the railroad traffic increased rapidly after the revival of the war. The rest of the main Tokaido line was electrified in 1956. In this way, the Electric Multiple-Unit started a new age of Japan. As for the main Tokaido line till then, the limited express which has a glorious history was running. It was the Limited Express Tsubame. TSUBAME is a swallow in English. This mark was a symbol of JNR.
This train was a limited express which represents Japan from before the Pacific War. This train was used for trials on how to run the track in a narrow gauge of early Japan. It is a traditional tale.