Rice is the fundamental principal food for about half of the world's population, and it supplies 20% of the calories consumed worldwide. Rice consumption increases with population. In the 21st century, a large increase in population is anticipated. Most of the increase will occur in Asia and Africa, where the population lives on rice. The food problem will become as important as the environmental problem. We present basic data for thinking about the food problem in the future. In this research, we consider Asia, Africa, Europe, the Americas and Oceania as model areas and examine rice production and consumption in each area. We study rice-deficit areas, rice-surplus areas, and their total balance.