# The Katana
The Katana represents the pinnacle of Japanese blade-smithing, combining a hard edge with a flexible core.
## The Forging Process
- **Tamahagane**: The 'jewel steel' used as the base material.
- **Folding**: The steel is folded up to 16 times to remove impurities.
- **Hamon**: The distinct clay-tempered pattern on the blade edge.
An analysis of the folding process and spiritual significance of the Japanese longsword.
Researcher Note:
Cross-reference with Bushido (Vol I).
Cross-reference with Bushido (Vol I).