If you are travelling to Japan, being a car enthusiast it is a good idea to visit Toyota Head Office and Factory in Aichi prefecture. To see production itself you need to go to the Toyota Kaikan Museum (map). From where you will be transported to the Toyota Motomachi Plant by bus.
While waiting for your tour you will be able to see Toyota’s latest technologies and innovations the company implements to the production.
But before you decide to take a tour of the production facility, please make sure you have time reserved for you. You can do the reservation here: reservation link