I take it this is instead of the Akita you were thinking of getting. As you did not comment on either of the posts regarding them, or on the kittens that you took to the rescue home, can I please ask that you respond if someone gives you advice?
Are you feeding a good quality puppy food, as they need quite a high protein food whilst they are growing, and if they are not getting all they need they will look elsewhere, to get all the minerals etc. required Also, is it possible the puppy was having to fight for food with its littermates, so it is now grabbing everything it can in case there is no more food forthcoming. Try feeding it in a confined area such as a cage or puppy pen or a fenced off area of the kitchen. Make sure it is taken out as soon as it has eaten as they usually need to go soon after a meal.
If you are unable to stop it doing it, one thing you can do is to add pineapple to the feed, I have never tried this but it works apparently. If it is only 8 weeks I presume it has only just left its mum and littermates, so might take a while to adjust to having its own supply of feed.