The authors describe the results of the logistics systems analysis of integrating production, inventory of overseas distribution center and multi-echelon international container transport, making use of computer simulation models. The fixed ordering point inventory system with economic order quantity (EOQ) is adopted and the overseas distribution center is usually replenished by the surface transport mode with lead time variation. And in addition, mixed mode transport and dual reorder point system in which the center is complementally replenished by the fast air mode in addition to the usual surface replenishment is adopted in this model. And making use of the simulation outputs, logistics cost analysis which focuses on the tradeoff among inventory cost, transport cost and stockout cost is carried out. The results of the analysis are as follows. (1) The variation of service level to the probability of stockout is about ten percent caused by the lead time element variation of each echelon of surface transport and the time lag among reorder time, shipment time at production and ship arrival time. (2) The service level of the distribution center increases when second reorder point for the fast air mode replenishment takes the value about forty percent of EOQ. (3) In the case of seasonal demand variation, the dual reorder by the fast air mode replenishment becomes more effective when the rate of present sales profit loss in the large stockout quantity exceeds fifty percent. (4) The estimation of loss caused by stockout is very difficult. But the dual reorder and fast mode replenishment become more effective when utility loss of waiting customers in backorder system is estimated so large and future profit loss caused by the loss of goodwill is added.