First I will say that while AMS might be considered to be a "hub" operation for us, it is nothing like the Narita operations.
AMS is a hub in the sense that we have MANY flights there from non NWA hub cities, many flights from the NWA hubs and a NWA flight from AMS to another international city (BOM).
The last I checked NWA flies to AMS from:
Non NWA hubs: PDX, SEA, BOS, EWR.
NWA Hubs: MSP, DTW, MEM.
International from AMS: BOM.
I think the BDL service has been halted.
So, while it is not the hub operation that Narita has, it gives Japan a run for it's yen when you consider all the crews that can meet up at the local watering hole for happy hour at oh, I don't know, 5 o'clock maybe.