The world’s food demand has been increasing due to population increase, developing nation’s income increase and the resulting change in diet, and an increasing use of biofuels. However, grain production and export rely on only a few countries, and with the recent global climate change, questions over sustainability have been steadily increasing. Korea’s case looks particularly serious because its grain supply, except for rice, heavily relies on import. This study analyzes how to secure a stable supply of grains that have a high level of reliance on import, and examines our current efforts to secure primary grains, which include wheat, corn, and soybean. It also looks at other countries in similar situations and their current trends in securing grain supply.