Report KAGINAWA in General Nihonto Related Discussion Posted February 25, 2014 The Kaginawa in this case was forged from one piece of iron. Looks like a seam/join right down the middle of the pictured piece. Probably two piece construction with the upper portion of each piece split into two and the hooks forged. Then each piece with two hooks forge welded together to produce the four hooks. Interesting piece and story.