Sujihiki knife, blade length 23.0cm, 150g. The spine is about 2.5mm thick near the top of the heel. The inscription is half-erased, only "常" is visible, but it's definitely correct because another knife with the exact same inscription was included in the shipment, and it was a knife that was too small to be restored. It seems to be an older brand. It's only found on the used market. It's a single-edged knife for right-handed users, but the material is carbon steel, as indicated by the inscription "日本鋼" (Japanese steel). Blade oil is essential. It looks quite old, but it's clean and has a popular one-piece bolster. The handle has a rough texture, but doesn't show much wear and tear, and should last for a while. It has been thoroughly sharpened, the blade has been honed, and it has been polished. Please see my profile for detailed restoration processes.