This blade began as a reclaimed piece of horse-drawn carriage spring and was hand forged in a charcoal fire, smoothed with files and a sen scraper, differentially hardened using traditional water quench yaki-ire, and polished by hand with natural Japanese water stones.
Crafted and finished entirely with hand tools and traditional techniques, the slender blade profile and thick spine are based on a classical yoroidoshi (鎧通し, armour piercing) tanto design.
The habaki was made from a piece of reclaimed copper bus bar, hammered to shape and soldered in the charcoal forge, and finished with rasps and hand files. The shirasaya (白鞘, storage scabbard) was carved from a piece of figured Japanese hounoki wood and finished with tokusa grass polishing and natural ibota wax. The mekugi was carved from a scrap of black buffalo horn.
Blade construction is muku with a hira-zukuri profile, suguha hamon, and an iori mune. The blade is 6.5″ long, overall length is just over 10.5″, and the overall length when sheathed is just over 11.5″. Accompanied by a hand sewn storage bag made of reclaimed hand-dyed cotton fabric from Japan.
長さ/刃長 Nagasa: 5 sun 4 bu (163mm)
元幅 Motohaba: 6 bu 5 rin (20mm)
重ね/元重 Motokasane: 2 bu 5 rin (7.5mm)
反り Sori: muzori
中心/茎 Nakago: 3 sun 1 bu 5 rin (94mm)
柄長 Tsuka: 3 sun 5 rin (93mm)
白鞘 Shirasaya: 9 sun 5 bu (297mm)
形 Katachi: hira-zukuri, iori-mune
刃文 Hamon: suguha
帽子/鋩子 Boshi: komaru
中心/茎 Nakago: futsu, one mekugi-ana, signed near the tip
銘 Mei: hot stamped katabami-ken kamon
拵 Koshirae: none (shirasaya, issaku)
Material: Reclaimed antique horse-drawn carriage steel, copper bus bar, Hounoki, buffalo horn