What I was told by members of Parliament with whom I spoke last fall was that at this point, there is no major, targeted opposition to this EPA. First, there is no identified product that will be a major red flag. Second, Canada has a relatively positive image in Japan and doesn't carry all the baggage the U.S. carries.
There are a lot of people who think the U.S. is trying to use them against China or that they're trying to pull this.... Canada is seen as an honest broker.
I haven't been told of major targets of opposition. It's still the most feasible for Japan.