Shindai Ressha are sleeper trains, which used to be common all over Japan. Now, because most people want to travel quickly and there are so many airports throughout Japan, there are only 6 such trains left. One of the most popular is the JR East train Cassiopeia.
Cassiopeia runs from Ueno Station in Tokyo to Sapporo, the capitol city of the north island, Hokkaido. It takes 17 hours, instead of a flight of less than 3 hours. But the gourmet food, plentiful amenities, stops in many interesting stations en route, and the romanticism, make the ride a whole different adventure than a quickie by air!