Abendsen makes a reference to a "bullet train". Some believe that in the alternate universe, the Japanese Shinkansen (bullet train) would not have been built. In any case the English language term "bullet train" was not used until after the opening in October 1964. However, there is no concrete proof that the Japanese did not build the Shinkansen - in fact, as one of the victors of WW2 they may have developed and created the train quicker than in the real world, which could also have brought forward the opening to earlier than 1964, and the subsequent phrase "bullet train".
There are no naval officers on the court martial convened for Admiral Inokuchi. As a naval officer, he would have the right to be tried before his fellow service's officers not just the Army's.