The tendency of agriculture in China is corporate farming. It's very inefficient for individual farmers to attend to their tiny lands and be exposed to high risks. US is doing greatly, with small agricultural population but huge yields. More and more farmers are going to cities or towns when the urbanization is accelerating. However, the agricultural output is not on the decline and more labour is into non-agricultural industries. The first policy of Chinese government for each year is always about agriculture which is more than important, it's about national security.
Agreed @AndrewJin , its always important to secure national farms and the nation's farmers.
Some of Japan's Farms: