The efficiency of 7 treatment methods for breaking dormancy in zoysiagrass (Zoysia japonica Steud.) seeds was synchronously compared.Two methods in which seeds soaking in 30% NaOH solution for 20 or 80 minutes were the optimum for breaking dormancy of seeds due to their simple and easy operation in techniques , economic and rapid effectiveness in performance and high germination rates (77 .6% and 88.0 % respectively)