Report Style or method of same on tsuka? in General Nihonto Related Discussion Posted April 12, 2020 The seam is central on the ura because of the emperor node placement being central on the omote. As that node is central on the skin, I assume it's easier to measure and a more economical way of using the skin. It also means there is a solid piece of same over the seam in the wooden core which would make for a more solid handle. I've also read(where, I can't recall) that the seam is put on the side so the user/owner can tell it is a full wrap of same, though obviously a panel can be cut in two and the seam faked. I've got an old tsuka(wakizashi) that has 3 pieces of same, omote is one piece with nice emperor nodes and ura is two pieces, joined in the centre but also joined mune and ha, negating the added strength of the full wrap but simulating it.But I suppose it's purely speculative to assume a full wrap makes a tsuka stronger; likely it does but is it over engineered? I don't know.