This is a kozuka, a small knife fitting for a Japanese sword. A dragon is inlaid on the handle. A signature and kao (written emblem) are carved on the handle. I believe it is likely "Goto Mitsuyuki." The small knife appears to have the character "Koma" (狛) carved on it. I couldn't determine if there was only one character or if there were more below it. The blade length is less than 15cm as shown in the image, so there shouldn't be any particular issues. The thickness of the kozuka is approximately 0.4cm. Please consider these measurements as a reference, as they are amateur measurements. The small knife has some dirt. There are dents and scratches on the handle. Please check the images. Details are unknown, so please confirm and make your own judgment. Condition: Possible dirt, age-related deterioration, and signs of use. Thank you for viewing. #Kozuka #Weaponry #SwordFittings #Antique #Crafts