>>940730Yes, between WW2 and the 1970s most electrification outside of the Northeast was discontinued.
>>940736Post-WWII Japan actually saw an increase in passenger traffic, which gave the JNR confidence to invest in the construction of the original Shinkansen.
That said, the success of the Shinkansen inspired Congress to fund the creation of pic related, which was capable of top speeds similar to Japanese HSR.