Most of what is farmed in Mississippi and the rest of the country isn’t food that goes on Americans’ tables. It is soybeans grown for animal feed, corn grown for ethanol, rice grown to export to Central America and so on. The fruits and vegetables that Mississippians eat are probably grown in California or in other countries.
There’s a food shortage in Japan in general. They’re net food importers. That’s why you keep hearing about agricultural innovations happening there like factory vertical farms and such. They’re capitalist so it’s not out of the goodness of their hearts, it’s because they don’t produce enough food domestically so they have to import and innovate or it all collapses.