The entire flight is going to take 6h45min, compared to 5h30min on SQ to KIX, because of the smaller plane.

The outbound flight is a red eye, so not so bad, but the return is a day flight. Good luck trying to spend that time without IFE, and poorer everything compared to SQ.

I'm actually heading to that area (Western Honshu) in autumn, but would rather fly to KIX than to take this direct flight.