Kozuka 共小柄

Called "Tomo Kozuka" 共小柄, this small dagger can slip into the sheath like a Kogata or Kogai.
It is however different from these and looks more like a Bashin (馬針), due to its one-piece design.
The Chinese quote 福運来勇奮, literally means "Joy and good fortune come to the brave/courageous".
It is also marked with an engraving (horimono) of Suken 素剣 on the blade, representing a double-edged blade. Specifically, it is a Tsume Ken 爪剣, a double-edged blade surmounting a pair of pliers (upper part of a Vajra handle).

Material: Steel
Length: 20cm
Thickness: 3mm
Weight: 40g.