context: So, shortly after the railroad opened, there was a movement to fix the cape gauge to a standard gauge. For it was a world standard. In the end, however, they could not be executed due to political disputes or budgetary issues, which forced Japan to wait many years before adopting standard arks on railroads. The first national rail that adopted the standard rail was the Tokaido Shinkansen (東海 道 新 幹線), built in 1964.
question: What is the first bullet train?
answers.text: Tokaido Shinkansen