If you don't feel like spending many hours in a train, you can consider travelling by plane. Especially if you have the possibility to book in advance, flying to Nagoya City can be definitely cheap.
In which stations can you take the train to Nagoya City and where will you arrive?
You can take the train to Nagoya City at SAPPORO-BEER-TEIEN or SAPPORO(JR), which arrives at NAGOYA or NAGOYA DOME MAE YADA.
How long to you need to get to Nagoya City by train?
While the first train to Nagoya City leaves at 06:02, the last one is scheduled for 23:02. The average duration of the journey is of 13 hours and 37 minutes, but the fastest trains can get you to Nagoya City in 9 hours and 57 minutes.