Excuse me, where did the Japanese mainly eat during the Anti-Japanese War?

In 1930s, after the Japanese occupied the northeast of China, they immigrated to the northeast on a large scale and occupied the land of China people. They produce grain here, which not only provides military food for the Japanese invaders, but also provides food as an important strategic material for Japan. Since then, Japan has established farms in Southeast Asia. Japan has 6.5438+0.2 million hectares of farmland in the world, which is equivalent to about three times the area of farmland in Japan.