[gamblor956]

They were above-weight for an emergency landing at SFO. Also, with the loss of one tire, even if they were within weight for an emergency landing, the additional pressure on the remaining tires from the full fuel takes could have caused a catastrophic incident.

In other words, it was safer for the plane to continue to its destination, since the reduced weight from fuel consumption during the flight would make a landing safer and the remaining tires less likely to explode.

[MBCook]

Plus a tire doesn’t affect the plane’s ability to fly so spending some extra time in the air isn’t dangerous. And it gives the pilots more time to assess the situation and plan.

It’s likely less disruptive to ATC at SFO too to not have them circling if they don’t have to.

[phantom784]

But its destination was in Japan.

Logistically, I'd think it'd be easier to have the plane return to SFO (potentially after burning off fuel) rather than going to LAX.

[fmobus]

LAX might be a better option for the airline, as it is a larger airport with several alternative flights towards Japan where passengers could be shuffled into.