HNL route is interesting since even on the K fare at least it's upgradable between EWR and HNL. (I mean with RPU/GPU, not miles + copay).
I didn't try yet to create an actual itinerary but looks like it can be routed via NRT/HND as well, possibly in combination with HNL from the way the routing reads. Finding NH space TYO-SIN in K may be another story though, I even have trouble finding W on a lot of days to SE Asia.