Oroshigane Kobuse Katana Shirasaya with Nashiji-hada Grain and Choji-midare Hamon Koshirae Temper Line (Hamon 刃文): Clay-tempered

Temper Line (Hamon 刃文): Clay-tempered Chōji (丁子) hamon – The blade is differentially hardened (yaki-ire / 焼入れ) to produce a lively

The design features a series of evenly spaced openwork segments radiating around the guard

ensuring precise proportions

iron) and finished with a deep black patina (煮黒)

Tsuba (Handguard 鍔): A mokko-gata tsuba（木瓜鍔） crafted from white copper（白銅） and finished in a traditional blackened patina（煮黒仕上げ / Nibu-iro）

Oroshigane Kobuse Katana Shirasaya with Nashiji-hada Grain and Choji-midare Hamon Koshirae Temper Line (Hamon 刃文): Clay-temperedFolded Oroshigane Steel Shinken () Nashiji Choji Katana: TangGu () Oroshigane () Kobuse Blade () + TangGu () Shirasaya Koshirae () This blade is forged from in house refined Oroshigane (), using the Kobuse zukuri () construction. The folding process produces a refined Nashiji hada (), where shimmering grain textures resemble scattered pear skin particles under light. Polishing reveals an elegant Choji midare hamon (), its clove shaped undulations