Let T L = Z/LZ be the one-dimensional torus with L points. For α > 0, let g : N → R + be given by g(0) = 0, g(1) = 1, g(k) = [k/(k − 1)] α , k ≥ 2. Consider the totally asymmetric zero range process on T L in which a particle jumps from a site x, occupied by k particles, to the site x + 1 at rate g(k). Let N stand for the total number of particles. In the stationary state, if α > 1, as N ↑ ∞, all particles but a finite number accumulate on one single site. We show in this article that in the time scale N 1+α the site which concentrates almost all particles evolves as a random walk on T L whose transition rates are proportional to the capacities of the underlying random walk, extending to the asymmetric case the results obtained in [5] for reversible zero-range processes on finite sets.