JNR had affected even the history in the world.

The railroad of Japan carried food to the cities devastated by the air raids. Moreover, the occupation forces' headquarters were troubled with supplies as most harbors in Japan were blocked by the Allied Forces' mines. Furthermore, there were many mountain ranges throughout Japan and the roads were not paved. Japan of those days did not have any highways etc. First of all, cars were almost all destroyed and the shortage of oil also caused a problem.
For this reason, the occupation forces made JNR drive trains for their exclusive use.
Even the occupation forces were troubled with starvation when there was no transportation on the railroads. And it may have made the people of ordinary Japan become increasingly destitute. Prudent parents cannot bear a child's starvation. It may have caused riots to generate. It may have become a tragedy like the "kamikaze" pilots. The wild confusion may have induced participation in the riots of the Soviet Union. It was a time of a cold war with nuclear weapons. It meant a decisive confrontation with the U.S. and the Soviet Union. The strikes by the socialists who had influence of the Soviet Union had actually occurred frequently in Japan in those days. Moreover, the demonstrations which required popular food occurred frequently. The U.S. may have become difficult about the victory of the Korean War because of the problem of supplies. The exact operation of the railroad of Japan affected the history of the world.