I don't think just producing meat is enough to stabilize the price of food anywhere.

It helps, reducing most of the need for government intervention, but it doesn't seem to be enough.

Also, it's wasteful, at least from some point of view. You stabilize the price by consuming the excess, but you would still need to survive an eventual shortage. It may not be a huge problem worldwide, but Japan in particular doesn't have a lot of excess capacity.