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Kozuga Companion Knife
Do you feel like your katana is missing something to be truly complete? It's the details that make the whole. The Kozuga companion knife (often also called Kogatana) is a traditional accessory that was inserted into a pocket in the scabbard (saya) of a samurai sword. This specific model will catch your eye primarily with its richly decorated gold-coloured handle and unconventional blade, which features a saw on the spine. It is an ideal piece for completing your sword setup or as a standalone collector's item that breathes the atmosphere of old Japan. Further product information ...
Kozuga Companion Knife with Gilded Handle and Saw Back
The Samurai's "Swiss Army Knife"
The Kozuga was not primarily a weapon, but rather a daily tool—a sort of historical EDC (Every Day Carry). Samurai used it for cutting paper, trimming lamp wicks, slicing fruit, or for minor equipment repairs. This model consists of two parts: the blade (Kogatana) and the decorative handle (Kozuka). The handle is made of yellow metal and decorated with a relief motif (please note that the specific engraving pattern may vary from piece to piece). The blade is narrow, single-edged, and features fine serrations on the spine, expanding its utility.
Technical Parameters
| Total Length | approx. 21.8 cm (8.6 inches) |
| Weight | approx. 40 g (1.4 oz) |
| Handle Dimensions | cross-section 13.5 x 4.2 mm |
| Blade Dimensions (at handle) | cross-section 1.5 x 12.5 mm |
| Edge Specification | Starts approx. 81 mm from tip, thickness approx. 0.3 mm |
| Features | Saw on the blade spine |
Placement and History
The Kozuga was traditionally slid into a slot called the hitsuania in the guard (tsuba) and subsequently into a pocket in the sword's scabbard. The handle was thus visible even when the sword was sheathed and often served as a decorative element that matched the other fittings (fuchi, kashira, menuki). Since this is a replica, I recommend measuring the slot in your existing scabbard before inserting it to ensure this knife will fit, as slot dimensions can vary between manufacturers.
Product Care
To ensure this accessory brings you joy for years to come:
- Surface Protection: The gilded handle may acquire a patina over time. To maintain its shine, simply polish it with a soft dry cloth. Do not use aggressive chemical cleaners.
- Blade: Since the blade is made of steel, keep it dry and occasionally treat it with gun oil to prevent corrosion.
- Usage: Although the knife has a saw and an edge, it is constructed as an accessory. Do not use it for heavy work or prying.
If you are looking for a way to revitalize your katana, this small but distinct detail is a great start.
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