I believe that Ryan is right in saying that the younger generation all live in the city now. With the heavy emphasis on being a professional rather than a farmer is prevalent everywhere. Just as important are the cultural arts and older customs that somehow slowly gets diluted generation to generation.
My great grand parents, Japanese Nationals when then made the trip over to Hawaii. Now I'm fourth generation, and sad to say that none of our family (my generation or my fathers generation) can speak Japanese. Living in Hawaii we ALL knew the learning to speak Japanese would payoff big in the long run......sad to say that I and most people I know who are regretting it now were just to lazy...I'll admit that.