The present study would focus only on the public investment for Agriculture in Hokkaido and would compare the results with the private invesment and would use Econometric models using the regression analysis. The study on the public Investment was conducted between the period 1996-2000 in the northern part of the Sapporo region of Hokkaido Japan and the as mentioned earlier the results of the same would be compared with another study conducted on the private investment. Therefore, it can be concluded from this study that the cost reducing effect of the Agricultural expenditures in Hokkaido is positive between the period 1972 to 2033 and it will become negative in 2034.