This article is from the Akitas Breed FAQ, by Kevin McIntyre with numerous contributions by others.
It is debatable how much exercise an Akita needs but a large fenced-in
yard is ideal for this breed. Akitas usually take well to
weight-pulling and sledding, though as a breed they are not highly
represented in such activities. Puppies should not pull any
significant weight or do roadwork until their bones and joints have
matured at about 18 months.