Abstract
Two Provisioned Japanese monkey troops, the Takasakiyama A and B troops have extraordinary large population sizes, consisting of about 1000 and 300 monkeys respectively. Dominance tests were conducted among identified adult females of the Takasakiyama A and B troops. Because many pairs showed indefinite dominance relationships and the linear dominance rank order was not observed, individuals were given"dominance rank by ratio".Information of the dominance tests was obtained about two other troops.Indefiniteness of the cominance relationships increased quantitatively and qualitatively with the increase of the population size of the troop. The discrepancy up to now in the reports about the process of troop divisions is related to the population size of the troops and the occurence of indefinite dominance pairs.