We are in the middle of Oneworld Explorer ticket with HKG-NRT and NRT-HNL the next flights (stopover in NRT).

To catch the ticket, we'll probably fly to NRT. Instead of flying to back and forth to HKG, what happens if we simply "miss" the first HKG-NRT flight. Can be board the NRT-HNL flight, or will all the remaining flights be invalidated for a no-show?