Shinkansen trip from Karuizawa Nagano bound to Tokyo availing the 50%discount fare of JR トクだ値. To avail for the promo of riding the fastest train in the world, you need to reserve online and should have Suica or other train electronic card and must be paid thru credit card only. The bullet train in the video is Asama Shinkansen.
To clarify, the fare we availed was priced to 50%less making it 2,800 Yen Only.
Online reservation of トクだ値 can be accessed thru
AloJapan.com