Toyota: North Mississippi plant will start production of Corollas in October | The Republic Too bad this was the plant where they'd planned to build Priuses and it doesn't seem slated to, for now. I wonder if that'll change due to the very unfavorable (to Japan) yen vs. dollar exchange rate. Related links: Toyota Motor Manufacturing, Mississippi, Inc. (TMMMS) About Toyota | Our News | North American Toyota Production Returns to 100 Percent