Depends on the variant. Let's say we're flying a Boeing Business Jet with maximum tankage. That would get you to ANC
to refuel and from there straight on into Tokyo. Flying a DC-9 series, a great circle route via the North Pacific would also make sense. Leaving from ANC
, you'd be one long flight leg to Tokyo. If fuel were a concern, Vladivostock could be a refueling stop. What would be more difficult would be a southerly crossing heading to Austrailia.
"When a man runs on railroads over half of his lifetime he is fit for nothing else-and at times he don't know that."