Super Hokuto runs between Hakodate and Sapporo. This train is connected to Hokkaido Shinkansen at Shin-Hakodate-Hokuto. So if you move from Tokyo to Sapporo, take Tohoku-Hokkaido Shinkansen and take this train for Shin-Hakodate-Hokuto to Sapporo. Japan Rail Pass covers all these trains from Tokyo to Sapporo.
But the trip between Sapporo and Tokyo is quite long trip. Please refer the link below to learn more:
Route, schedule and trip time
Super Hokuto runs more than 10 trips a day. It takes 3 hours 10 minutes by the fastest Super Hokuto between Sapporo and Hakodate.
You can find the timetable in the link below:
JPRail.com PDF timetable (valid until mid March, 2020)
Super Hokuto is operated by KIHA-261 or 283 series. Ordinary seat is 2+2 seat configuration and Green seat is 2+1 seat configuration. These two fleets are very similar. You may not care about it
*Sonic Rail Garden has copyright for all images of accommodations below.
Train formation by 281 series
*Some more cars are added in the peak season.
Train formation (261 series)
Images – KIHA-281 series
Images – KIHA-261 series