I suggest you look at a map. Japan is about twice as far away from Valdez as our West Coast Refineries.
If you’re Japanese which is closer? Alaska or Kuwait?
Distance is really not that important in the crude shipping business.
You must consider that a year 2000 built 200 000 TDW VLCC procured from a Korean yard would have cost ~USD120M with a lead time of 1 year, whilst a similar Jones Act compliant ship from an American yard would cost ~USD300M with lead time of ~3 years. One of the main costs of tanker ownership/operation is capital amortisation, and you may readily see that the second option would substantially raise the dayrate/WS.
Further, an American crew would cost at least 4 to 5 times that of a Filipino crew with Japanese or Korean officers.