Quick post. Wanted to share something I came across a while ago whilst looking up a blade in Satō Kanzan’s Shintō Oshigata. The book features a blade by Hizen Tadakuni (肥前忠国), which shows a hardening pattern in the form of the Kanji characters for “tiger” (虎) and “dragon” (龍), plus the shape of a dragon as well. Just thought you might find this interesting, as I did.