IJ 622 then IJ 253 at Narita
Hiroshima → Tokyo → Tianjin
Timetable, Tokyo time
11:40IJ 622 from Hiroshima at the gate
11:00IJ 253 to Tianjin leaves the gate
23 h 20 apart on the timetable, overnight
IJ 253 leaves 23 h 20 after IJ 622 arrives on the timetable: more than half a day, so not a connection we count.