The Post is a more sensitive issue. It's politically salient. It's probably more difficult.
Under Koizumi, in 2005, they went through a liberalization of the Post that would liberalize it for the private sector in Japan and also for international insurance companies. It just went backwards on that, in part because the current government is in coalition with a small party, led by Kamei Shizuka, that cares only about going backwards on the Post and holding the fort as it was in the past. A lot will depend, after the election, on whether the political lobby around the Post has weakened enough. That is probably more sensitive. It's up for negotiation, but I think it will be a more treacherous negotiation.