Narita to Singapore
First day that counts as SEA, still a travel day. Landed NRT at 15:00, about a three-hour layover, then JL 711 from Narita to Singapore, 18:05 to 00:20 Saturday morning.
Got into some katsu curry during the Tokyo layover. Door-to-door from TPA Thursday morning to SIN Saturday 00:20 is about 39 hours on the clock.