I thought it had finally been established that Kunimori blades were not made by Miyaguchi, only signed by him. According to his son, who helped hold the blades while his father cut the signatures, they were made in bulk by a smith in Shizuoka prefecture named Mitsukoshi Hiromasa, using western steel. Apparently they were forge welded, but the exact nature of their construction is not known. They were known to have been made of western steel, this is not in dispute....This came to light some years ago...