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Very Rare Ozuku, All ozukus tend to come only hard, this one is amazing cool color, like hakka just much finer and harder
But this one is for knives and tools, very smooth and medium hardness
Not to hard not to soft, produce very black swarf very easy
They are very sought after in Japan as Ozukus considered to be amazing stone when it is not super hard and scratchy
Very rare stone that is super fine, Fines on these like with nakayamas is much higher then they hardness
Makes amazing finish
Best with Nagura !
No toxic lines or inclusions
Size: 205mm 75mm 37mm