Chu Genno Japanese Hand Made Hammer by Kouzaburo - 120 Monme
Smith name: Hasegawa Kouzaburo (1935~2004)
Shape: Square
Type: All steel
Total Weight: 586g
Height: 93mm
Head size: 30mm x 28mm
Hammer eye size: 24.7mm x 7.0mm
Vertical-to-horizontal ratio of the eye: about 3.52 : 1
Manufacture Era: around 1970s (according to collector’s memory)
Accessories：-
Additional Information: This hammer has seen extensive use over the years, but both the head and handle remain in good, solid condition. The handle is crafted from premium ebony. It was acquired from a retired miyadaiku (temple and shrine carpenter) in the Chiba area, who originally purchased it 50 years ago and used it as his primary daily workhorse. Based on the proportions and geometry of the eye, it is unmistakably an early work by Kouzaburo.
According to information provided by Tsuchida-san, Japanese genno (hammers) are traditionally classified into four size categories:
Mame-genno (豆玄翁): Refers to 20 to 30 monme (approx. 75–112.5 g). Used for driving nails and other small hardware.
Ko-genno (小玄翁): Refers to 50 to 80 monme (approx. 187.5–300 g). Used for striking oire-nomi (bench chisels).
Chu-genno (中玄翁): Refers to 100 to 120 monme (approx. 375–450 g). Used for versatile, general-purpose tasks.
Dai-genno (大玄翁): Refers to 150 monme or heavier (approx. 562.5 g and above). Used for striking heavy timber chisels (tataki-nomi / atsunomi).
選擇選項