This paper examines the effects of LNG demand for power generation on the storage requirement when the supply of LNG is secured via import. Given the LNG demand pattern of other sectors, it is shown that various LNG demand pattern for power generation can still guarantee the optimal inventory. This result has a very interesting implication that power generation company can have various options to choose from. In addition, the sensitivity of different import schedule on the optimal inventory is also examined. It is shown that both import schedule and LNG demand pattern of power generation company are major factors in determining the storage size.