Abstract
Author thinks it is undisputed fact that today's automotive is the direct descendant of horse-drawn carriage used in western countries. On the other hand, we had used ox-drawn carriage in our medieval history. Although the knowledge of ox carriage went to oblivion from modern automotive engineer, they themselves had pregnant universe. This paper is one attempt to dig out our lost roots of wheeled vehicle from many aspects; origin, structure and utilization style.
