The flight from San Francisco (SFO) to Narita (NRT) takes about 10h 7m nonstop on a widebody airliner, covering 5,112 miles (8,227 km).
Narita is 16 hours ahead of San Francisco. You cross 16 time zones heading east. Eastbound trips like this one tend to be harder to adjust to, so plan for a day or two of jet lag.
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