fair enough.
I've travelled on these "bullet trains", not in Japan, but in both China and Taiwan, they are ace...and they're always on time, which is nice. From memory, when they're racing through the countryside, they're bolting along at something like 280/300Km per hour. I remember last time I was in China, I was on one for over 8 hours, at eyewatering speeds, we must have done over 1500 kilometers, we had first class tickets and they cost us about £45 each 🙂 (I'm not comparing costs to the UK, because you just can't really, but it was amazing and less than half the price of an internal flight)