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An awsome double sided koppa. If god were to create an ergonomic razor stone, this would be one pattern that he would make over and over again. Both sides are equally effective, but you can imagine if you like that they are different. I do.


Being 25mm thick it sits well above the palm, and with the contured side at your thumb, the gently curved side will encourage circular strokes in the middle and long X-strokes from pointed end to pointed end for detail touches. Really a fun and lovely and effective stone.



Size 185-55-25

Weight 390gm

Hardness  5+

Cutting speed 5+

Fineness 5+

Pleasure 5++



#123 Nakayama iromono kiita koppa

Excluding Sales Tax
  • JapanStones is a mom and pop company. We only want happy customers, and with this in mind please read the following.


    I offer a full 30 day money back guarantee minus the return shipping for all of my stones unless a stone is noted as an "As Is Stone" within the Product Description. These so called As Is Stones are pre-priced at a discount as a flawed stone.


    I Alex Gilmore the seller, will accept the return of any stone, and will refund for any stone without question although be for-warned that for "As Is" stones there will be a "restocking fee" equal to but not above the actual initial shipping cost (the cost which I incurred) will be deducted from the refund. The average shipping cost is $8 for domestic, $35 for international  USPS Small Flat Rate Box.


    All shipping from California to the purchaser within the USA is Free unless other wise noted within the below policy details.

    All smaller stones (equal to or less than 170x75x15mm wide) are shipped USPS International for Free.


    Larger and expensive stones are shipped Free Shipping by Medium Flat Rate USPS within the USA.


    Larger and Expensive stones shipped International are by FedEx International - with a cost sharing plan of 50/50 between buyer and seller.

    Please check with Alex on any and all issues if in doubt before purchasing.

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