It is interesting that all polls seems to indicate that a majority of the voting population seems to be opposed to changing Article 9 but it seems that this upcoming election will give a clear mandate for such a change. If these were the results then Abe will go down as one of the if not the most powerful and impact PMs in postwar Japan. Most of his policies for economic and demographic revival are going nowhere but it seems his real goal of changing the Constitution is likely to be realized.
Surely, since constitutional amendments require a referendum, it will then simply fail to pass at that stage? (unless Abe succeeds in shifting popular opinion, that is)