Board Thread:Versus Debates/@comment-26958911-20151010214426/@comment-26636534-20160102161044

Yes, but if the toads are on Jiraiya's shoulders, then as they are casting the genjutsu Jiraiya can continue fighting as usual. Remember, Itachi is susceptible to sound based genjutsu even in his susanoo and besides it would take Itachi by surprise as well.