Mukomachi-Nomi Japanese Hand Made Mortise Chisel by Sukehisa - 9mm

Brand name: Sukehisa(助久）

Smith name: Unknown

Steel: White Steel 

Blade width: 9.1mm

Blade thickness: Blade Bottom(about 15.1mm), The blade near the bevel (about 12.1mm)

Manufacture Era: before 1960s (according to collector’s memory)

Blade Angles: 31°

Total length: 213mm

Neck length: 36mm

Blade length: 75mm

Types of wooden handles：Japanese White oak (Shirakashi)

Weight: 165g

Accessories：—

Additional Information: The chisel is pre-owned but remains in good condition. It comes from a retired Tateguya artisan in the Tokyo area. I have completed the basic sharpening, conditioning both the bevel and the ura (back) up to 1000 grit.

Although the wooden handle is slightly warped due to years of heavy use, the craftsmanship of the blade itself is incredibly fine. The last four photos show the top of the blade, the beautiful concave details on both sides, and the ideal depth distribution of the ura.