When has Imperial Japan ever cared about infuriating the American public? It's their whole concept of "hey, they can kill us all, so let's hit them first and scare them because they don't have enough fighting spirit" that we saw in action at Pearl.
True. Note that they did employ bio and chem attacks against Chinese civilians and wanted to employ them against US forces in the Pacific.
If they were to attempt such an attack on the US west coast, I wonder in San Francisco wouldn't have been a better target...
But more important, as I said above, is what information they get and when. If they get certain details in time, F-Go may have gotten underway earlier.
If they got enough details and
if the IJN was able to push enough resources to Arakatsu, or better (worse, really), a cooperative project with Germany, a crude device might have been available as the ultimate Tokkotai for use against the invasion fleet for Operation Iceberg.
Then you'd
really have a bad result for Japan.
And combine it with a successful west coast attack like you suggested above...
Tokyo, Kyoto, and Osaka would be the start...