Ya, war against Toku sucks. With barracks we could see a shock axe attack at any time pretty much, and it will have better odds than one of our axes defending on a hill.
If we are intent on taking Osaka, it might be possible to herd Toku's axe that is south of our Sheeptown. Send two healthy axes 1E and another healthy axe+injured axe with the promo onto the hill 1S1E. If Toku's axe attacks across the river against either pair, he will have less than even odds. If he attacks Sheeptown he will die for sure. If he moves 1S1E, then our two pairs of axes can converge onto corn and block him from Osaka. If he attacks our stack of 4 axes at that point since he has superior odds, then the pair of trailing axes can finish him off.
It is possible that in doing this, Osaka could finish a shock axe and attack our pair of axe on the grass tile and kill one. Or, Toku could send a shock axes to kill our axe on a hill, and the injured axe might be killed by Toku's axe south of Sheeptown. The safer path would be to move 4 axe onto sheep, then move them onto the hill 1N1W of Osaka. We would be less likely to lose axes this way as the situation develops, but Tokugawa would have a much easier time reinforcing Osaka this way too. Once again, I'd say this decision is a tough call.
There are good benefits to capturing Osaka. We get the corn right away. We get an important piece that we can use later to get open borders with Tokugawa. This could be important as it appears the only way to the other side of him is open borders, a spy, or taking his capital. Also, since he appears to be landlocked/cornered, should he become our AP opponent I can't imagine he would be able to muster many votes.
chops, the granary will finish. So I'd like to do something more like bcool's suggestion 
