I had a saya made in Japan many years ago, and subsequently, part of it has come loose. It's in handachi/tachi style, and is otherwise perfect, but there is a metal collar (apologies, I can't remember the proper term for it) that is meant to be stuck to the saya approximately six inches up from the end.
But it's come loose and is sliding freely up and down. I suspect that the saya is actually a tiny bit too thin for it, but it was stuck on when I first got it.
Anyone got any suggestions on how best to repair this? What's the best way to bond metal to lacquered wood. Is something like superglue the way to go, or is there a better way to do this, short of sending the saya back to Japan.