Japan tests world's fastest bullet train
https://edition.cnn.com/travel/article/japan-fastest-bullet-train-alfax-scli-intl/index.html
Tohoku Shinkansen, on which this bullet train will be tested, is requested to raise maximum speed. That's because it becomes more difficult to be competitive against airplane, after extension to Sapporo.
So, it's understandable that the rail company is dedicated to the test.
