What is hada, and can I see it on a folded steel wakizashi?
Updated Mar 2026
Hada refers to the surface grain pattern that forms when steel is repeatedly folded and forge-welded during hand forging. As the smith folds the billet - sometimes hundreds of times - carbon distributes more evenly and microscopic layers of slightly different density create a visual texture across the polished blade face. On a 1000-layer folded steel wakizashi, this hada appears as a fine, wood-grain-like shimmer that shifts as light moves across the blade. It is best observed under a single directional light source - an angled desk lamp or natural window light works well. Hada is one of the features that distinguishes hand-forged blades from stock-removal or machine-ground production pieces, and it is a primary criterion that serious collectors use to assess the level of craftsmanship invested in a blade.