I must admit that the discussion has become extremely interesting. Thank you all very much!
Can you please tell me where Mr. Fred Weissberg's article was originally published?
I will make time to read the article today. It promises to be very interesting.
I also read something very interesting in Okabe-Kakuya. He says: "It is related that once Taiko-Hideyoshi, the Japanese Napoleon, saw the swords of his generals lying on a rack in the antechamber of his palace, and so expressive was their individuality that he at once recognized to whom each belonged.".
It would be assumed that the generals' swords were in scabbards. In this situation, what gave each sword its individuality and linked it to its owner were the tsuka and tsuba.