NH 8421 then MM 571 at Narita
Chicago → Tokyo → Sapporo
Timetable, Tokyo time
18:38NH 8421 from Chicago at the gate
14:45MM 571 to Sapporo leaves the gate
20 h 07 apart on the timetable, overnight
MM 571 leaves 20 h 07 after NH 8421 arrives on the timetable: more than half a day, so not a connection we count.