We simulated to what extent cable logging cost will be reduced and what kind of effects will be made on the spatial distribution of harvested stands by integrating adjoining private stands. Study site is 2,229ha private sugi(Cryptomeria japonica) plantations in Sanpoku town, Niigata prefecture. We assumed clearcutting and commercial thinning of old-aged stands as harvesting types, and Endless Tyler cable logging and tower yarder logging as logging types. Simulation for 30 years with integrating adjoining stands in order to make each harvesting lot large enough showed that logging costs decreased signifi cantly in commercial thinning of old-aged stands which has the minimum limit of a setting area as the prerequisite of subsidy and in Endless Tyler logging of which high fi xed cost requires enough harvesting scale. The results showed that such eff ects of integration will be sustained or increase over the coming three decades, total reduction of logging costs in Sanpoku town will be annually several million yen and integrating can concentrate harvesting lots near roads.