I think the difference is that for the most part, small and medium businesses in Japan are just trying to fit the size of their role in their communities, growth for the sake of growth isn't the goal.
Just observations and idle thoughts from me though, both views on growth clearly have merit and I can't actually speak for Japanese business owners.
Debt used for unsustainable growth could be extremely destructive. It is needed, for example new machinery and so on, but investment has to return more than you pay on it.
Quite - the organic size, if you will. In biological bodies, organs that become overdeveloped or overused relative to the rest of the body lead to disease. MY loose analogy for economics is that your body can only store so much excess sugar before you acquire crippling diabetes.