I knew that Japan was a good export market for you hay growers, and I knew presumed that land is scarce for the Japanese to grow their own hay.  SOoooooo, my question.......  what happens to all that cow poop that happens after they import all that hay?  If they don't have the land space to raise the hay, where does the cow poop go to? 

(You probably don't know the answer, and I don't expect you to.  However, I had to ask!)