[bobthepanda]

So it depends on what you mean by majority.

If you were to talk in terms of asset value, then yes, the government did fund most of it; but that was because the Shinkansen were enormously expensive compared to the old, narrow curvy mainline network. In fact, the large Shinkansen debts are why JNR had to be privatized; the government restructured the private groups so that all the debt was confined to a ‘bad bank’ paid for by the government.