Kannaba Japanese Smoothing Plane Blade By Sukekuni - 80mm
Brand name: Sukekuni (助國）
Smith name: Unknown (might be a Tokyo blacksmith)
Steel: Carbon steel
Jigane: May be “Honsui” (Since the pattern on this jigane is quite rare, I asked Mr. Tsuchida about it. He told me it's highly likely that a type of jigane called 'Honsui' was used)
Blade Width: 80mm
Blade length: 93mm
Blade Weight: 392g
Blade Angles: 23°
Blade thickness: Blade top(about 10.50mm)，The blade near the bevel(about 6.50mm)
Accessories: -
Manufacture Era: Before World War II
Additional Information: Used, in good condition.This blade comes from the descendant of a retired carpenter in the Tokyo area. I have restored and sharpened it, taking the bevel up to about 6,000 grit (using an Uchigumori stone), and the ura (back) to about 1,000 grit. It will require further sharpening on your end before it is ready for use.
The jigane (soft iron) of this blade is very interesting, featuring a hamon (temper line) that I have never seen before. I recently consulted Mr. Tsuchida for his expertise. He suggested that this is likely a rare type of soft iron imported from Europe during the Meiji era, known as 'Honsui'. He noted that the quantity of 'Honsui' imported was significantly smaller than that of common wrought iron. If I remember correctly, he explained that the name 'Honsui' is derived from the country of origin—Switzerland. In Japanese, Switzerland is called 'Suisu' (written as スイス). And 'Hon/本' carries the meaning of 'genuine' or 'authentic' in Japan.
The blade is also crafted with a relatively high level of precision. The 'Sukekuni' mark stamped on it is mirrored, making it difficult to determine whether this blade is actually connected to the chisel blacksmith 'Sukekuni'. For more information about the chisel blacksmith 'Sukekuni', please refer to my blog post “OTHER TOKYO CHISEL MARKS”.
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