AM 90 then 7C 1103 at Incheon
Monterrey → Seoul → Tokyo Narita
Timetable, Seoul time
14:15AM 90 from Monterrey at the gate
10:257C 1103 to Tokyo Narita leaves the gate
20 h 10 apart on the timetable, overnight
7C 1103 leaves 20 h 10 after AM 90 arrives on the timetable: more than half a day, so not a connection we count.