Are the Japanese selfish, altruistic or dynastic?

I analyse a variety of evidence for Japan and, A here available, for the United States on bequest practices' the importance and nature of bequest motives, bequest division, the willingness of individuals to help others, etc., in order to shed light on which model of household behaviour applies in the two countries. My results suggest that the selfish lifecycle model is the dominant model of household behaviour in both countries but that it is far more applicable in Japan; that the dynasty model is also more applicable in Japan but is not of dominant importance even there, and, conversely, that the altruism model is far more applicable in the USA.