SQ 638 then NH 819 at Narita
Singapore → Tokyo → Manila
Timetable, Tokyo time
07:30SQ 638 from Singapore at the gate
22:55NH 819 to Manila leaves the gate
15 h 25 apart on the timetable
NH 819 leaves 15 h 25 after SQ 638 arrives on the timetable: more than half a day, so not a connection we count.