TR 671 then JL 712 at Changi
Chiang Rai → Singapore → Tokyo Narita
Timetable, Singapore time
19:40TR 671 from Chiang Rai at the gate
08:15JL 712 to Tokyo Narita leaves the gate
12 h 35 apart on the timetable, overnight
JL 712 leaves 12 h 35 after TR 671 arrives on the timetable: more than half a day, so not a connection we count.