chisa katana vs kokatana
I've been curious about the difference between a chisa katana and a kokatana (or is it more appropriate to call it "kogatana").
I know enough Japanese to understand the meaning of the terms. Are they perhaps the same thing or is there any point in distinguishing them? Is one term more common than the other?
Also, I've heard mixed things about the different lengths of swords and the determining sizes. For instance, the point when a wakizashi becomes a katana and a katana becomes an otachi or a daitou.