There is something special about sharpening knives or tools on a natural, mined stone. Whilst this has not been definitively proven, natural whetstones have varying grit levels, which is said to cause tiny variations to the sharpened edge which results in different wear rates and longer edge retention.

These Amakusa stones are quite hard in composition, raising lower levels of slurry, and are estimated overall as a medium grit, circa 800.

Please note - the photograph is of one example of this stone, so while they will always be similar, there will be differences from stone to stone.

Brand: Morihei 森平
Product Type: Natural Stone
Size: Type 15
Mine: Amakusa
Producing Area: Amakusa-Kumamoto/ Japan
Soaking Requirement: Not required