The economic regional difference of Japan reduced greatly in 60’s and 70’s. But it turned adversely to widen in 80’s. Mainly because of the influence of the breakage of foam economy of Japan in 1990 and the East Asian economic crisis in 1997, it turned to reduce again in 90’s. Now it is relatively small. On the level of province, the ratio of the highest national income distributed per person with the lowest is about 2 times while the ratio of the highest GDP per person with the lowest is about 3 times. Even so, the regional differences of population density and economy density are still very high.