Binsui Sword Grade Old Stock Medium Grit Japanese Natural Whetstone - Choose Your Stone

Offered here are large, extremely old, vintage sword grade Binsui. These Binsui were sitting in our wholesalers warehouse for generations. So much so that some of them had oxidation from sitting so long. This is typically a great sign as these old mined, high quality Binsui are becoming extremely rare, with mining stopped decades ago. Binsui have been used for generations as a medium grit stone, following Amakusa. These sword grade stones feature the characteristic purple spots which high grade Binsui are known for. These Binsui do an excellent job in bevel setting and coarse scratch removal. Due to their hard base, they excell in particle breakdown and are capable of impressive levels of refinement if the slurry is worked. 

NOTE: These stones require lapping before use. We offer that service here.

For razors, these Binsui can be used in place or after a synthetic bevel setter. They quickly remove the deeper scratches, especially when used with forced slurry, and as the particles break down, the finish becomes increasingly more fine. These stones can be followed by either a Mikawa Nagura progression on a fine finishing stone or followed by fast cutting pre finishing stone. For polishing tools, knives and swords, these Binsui do an amazing job in removing scratches from Omura or medium coarse synthetics. forced slurry speeds the stone up and results in a coarser polish. When used with water only, they release some self slurry which can be broken down, resulting in a beautiful finish which is ready for a fine medium grit or fast pre finishing stone. 

Choose your stone from the pictured and below described stones:

Binsui 1

215 mm (8.46") long × 65 mm (2.56") wide × 90 mm (3.54") tall
Weight: 2878 g (101.53 oz / 6.35 lbs)

Binsui 2

215 mm (8.46") long × 65 mm (2.56") wide × 85 mm (3.35") tall
Weight: 2946 g (103.92 oz / 6.49 lbs)

Binsui 3

215 mm (8.46") long × 65 mm (2.56") wide × 85 mm (3.35") tall
Weight: 2866 g (101.08 oz / 6.32 lbs)

Binsui 4

215 mm (8.46") long × 65 mm (2.56") wide × 90 mm (3.54") tall
Weight: 3004 g (105.97 oz / 6.62 lbs)