NH 8421 then MM 573 at Narita
Chicago → Tokyo → Sapporo
Timetable, Tokyo time
18:38NH 8421 from Chicago at the gate
15:35MM 573 to Sapporo leaves the gate
20 h 57 apart on the timetable, overnight
MM 573 leaves 20 h 57 after NH 8421 arrives on the timetable: more than half a day, so not a connection we count.