7C 1187 then IJ 253 at Narita
Seoul → Tokyo → Tianjin
Timetable, Tokyo time
11:057C 1187 from Seoul at the gate
11:00IJ 253 to Tianjin leaves the gate
23 h 55 apart on the timetable, overnight
IJ 253 leaves 23 h 55 after 7C 1187 arrives on the timetable: more than half a day, so not a connection we count.