Honesuki knife, blade length 13.7cm, 134g. The spine is about 3.0mm thick near the top of the heel. The absence of the ○秀 mark and the typeface suggest this is from the So-Honten (Main Branch) rather than Tsukiji Masamoto. The brass bolster on the handle indicates it's a fairly old model. It's a right-handed single-edged knife made of carbon steel. Blade oil is essential. The handle shows some wear, but there are no gaps or cracks, and it seems it can still be used for a while. It has been thoroughly sharpened, and the blade has been polished. Please see my profile for detailed restoration processes.