Topic: Unlocking the Secrets of Tamahagane Katanas: A Collector's Guide
The method of making tatara iron that has been passed down from generation to generation is based on a method developed by the blacksmiths of the late Edo period, "Suishinshi Masahide", who is considered the founder of the Shin-Shin-To style.
Also visit my blog post; Musashi Sword Artistry