Not bad to put out a case report, since if there is truth here, this could spur future knowledge. But it seems unlikely that wasabi was causal compared to, say, the wedding itself.

Come to think of it, triggers are not necessarily the underlying causes, so this particular diction in the abstract and title may be fully apt.

If we lived in a world where we could go back and see the true causes, I would bet that the true cause was not the wasabi. If historical evidence says that P(takotsubo|wedding) is low but nonzero and P(takotsubo|wasabi) is virtually zero, then my money is still on the wedding being the cause, even if nobody else at the wedding got takotsubo. (It's not thought to be transmissible as if it were an infectious disease.) Happy to be wrong here.

But, like any case report, this case report is interesting (which is why it was published). And if more evidence accumulates that wasabi can lead to stress cardiomyopathy, that would, indeed, be interesting.