What is jihada, and how do I identify it on a blade?
Updated Mar 2026
Jihada refers to the surface grain pattern visible on a polished tamahagane blade — the visual result of folded steel layers expressing themselves through differential light reflection. Depending on how the smith folded and oriented the steel during forging, jihada can appear as itame (wood-burl pattern), masame (straight grain), or mokume (more pronounced burl). To identify it, examine the blade under a single directional light source — natural daylight at a shallow angle works well. The grain will appear as a subtle flowing texture across the flat (ji) of the blade, distinct from the hamon and from any surface scratches. On lower-quality pieces, what looks like jihada may simply be a surface etch applied chemically. Authentic tamahagane jihada will be consistent in depth and orientation and will not disappear with light polishing.
