Hand forged in a charcoal fire, water quenched, and shaped with waterstones. This diy blade is a similar size and style to the Forest Kotanto but has a slightly trailing point. Design and order a complete knife here.
The narrower blade profile and sturdy spine of this kotanto are based on a classical yoroidoshi tanto.
This blade was forged from a reclaimed caterpillar bearing race and as such is very tough, wear-resistant steel. The edge hardness tests between 60-65HRC. The geometry is fairly well established but could use some refining. It has been given a kaji togi / stone finish with a coarse waterstone and could be sharpened and used as is or given a full polish.
The double tapered tang is constructed in a similar manner to a Japanese sword requiring only a single bamboo peg to hold the knife assembly together. In addition to the sense of beautiful simplicity, this design allows the knife to be taken apart for cleaning, polishing, detailed cutting tasks, or major resharpening work.
The blade is about 5.5″ long with a tang length of just under 3.5″. The spine at the munemachi is 7mm (just over 0.25″) thick. The tang has already been drilled with a mekugi-ana.
Nagasa (blade length): 139mm
Motokasane (blade thickness): 7mm
Motohaba (blade width): 22mm
Sori (curve): 1mm, sakizori
Nakago (tang): 87mm, osuriage, single mekugi-ana
Mei (signature): mumei (unsigned)
Materials: reclaimed caterpillar bearing race
This piece is in a private collection in New Hampshire.
This is one of the blades featured in this video broadcast on Japanese television: