Close to 100% full for the next few days looking at the the seats available, they only seem to list/release them in numbers of 4 though.
The 380 between SIN-NRT is also doing a roaring trade, zero seats often.
You would be one happy airline
to see this on most days:
SQ 638 SIN 23:40 NRT 07:30 +1 380 0 R0 Z0 C0 J0 D0 S0 Y0 E0 B0 M0 H0 W0 Q0 N0 L0 K0 V0 T0