Deba knife, blade length 18.5cm, 321g. The spine is about 8.6mm thick near the top of the heel. It's a brand from TADA-FUSA Knife Studio (Tadafusa Co., Ltd.) in Sanjo City, Niigata Prefecture. This is an authentic kasumi knife, made by laminating soft iron and steel. It has almost no signs of use, and both the blade and handle are very clean. The characteristic diagonal lines from when it was new remain on both sides. As shown in the last photo, when held up to the light, a slight stain-like mark can be seen above the inscription. The plastic handle retains over 80% of its original luster. It seems like it can still be used for a long time. It has been thoroughly sharpened, the blade has been honed, and it has been polished. Please see the profile for detailed restoration processes.