As for PDX. I can't believe it does well enough now to keep flying to NRT. Without any feed at HND I will be shocked to see it survive. If JL/NH entered DL would be crazy to even stay 1 second longer. With no feed on either end they would be demolished. I wonder if DL has a plan for where to ask to move the MSP and PDX slots already? I'm very puzzled by PDX-HND on DL. At least HND-HNL I can tell myself is there to build Japan point of sale brand strength...at great cost I suspect. IDK what PDX-HND is for. They can cover it very well over SEA and it's not as if DL is a hub carrier in PDX...maybe decades ago.
So... you are not counting any of these non-stop flights that Delta operates from Portland daily?
I get that Delta doesn't operate dozens of flights out of Portland to dozens of cities in the US, but to say there is NO feed on the US end is a bit misleading. There are 29 flights from Portland to other cities daily, including 2 other international destinations. You are correct, there will be nothing in HND. There are several multi-national companies based Portland as well... Nike, Adidas, Columbia, Patagonia... etc.
Yeah, there's no feed. Those are all other DL hubs.
LAX is circuitous and non-stop.
DTW is non-stop.
JFK is much closer via DTW.
ATL is non-stop.
AMS (I'm wiping the tear of hilarity from my eye.)
LHR (same as above)
So no. With the exception of SLC there is no feed of consequence. According to MIDT less than 7% of the traffic connects to Tokyo on the PDX side. About 1/2 is SLC and the other half is a mix of interline and those bargain bin double and triple connects they push on you. For example, CLE-DTW-SEA-PDX-NRT for $199 shows up, that's like $70 per flight, LOL.