Re: Dogi worn wrong?
Both the drawing of large swords and smaller objects reflect a cultural enforcement of right-handedness.
My tendency is to think that the rigidity of Japanese culture's enforcement of right-handedness developed as a matter of practical safety, to prevent excess occurrences of saya-ate.
In my house, we just seat the lefties at an appropriate corner of the table.
Men's shirts in the West follow the Japanese model, although the cut is rather different.
Now here's a question for the historically fashion minded: why do Western women's blouses close right over left?