What do we have that the Kurosawa want anyway? Jutsu from the Leaf Library aren't ours to trade away. I'm not convinced that we have a good offer to makeMarked for Economics what? The sooner our status is "not broke", the better, and WE are broke. If it bothers you so much, we can just offscreen it.
Now, diplomacy. That's important stuff, but I am afraid Hazo is simply just inept at this. That's why we have Mari, who can do the diplomacy thing for us. What it looks like, jutsu, genin squad exchange, etc, whatever, is another matter.