Japanese natural stones — called Tennen Toishi, or JNats for short — are mined from ancient sedimentary rock layers around Kyoto, mainly the Narutaki district north of the city. Mines like Nakayama, Ohira, Atagoyama, Shobudani and Ozuku each produce stone with its own character — different hardness, speed and finish.
I select and test every single stone myself before it goes on the site — on razors, knives and tools. Each one gets its own description with relative hardness and best use. If a stone has any toxic inclusions or lines, I state it clearly. If nothing is mentioned, there are none.
Picking the right stone matters more than people think. If you are not sure which one fits your knife or razor, email me before buying and I will help you find the right match.
One more thing — always seal your stones, synthetic or natural, with a waterproof lacquer or by gluing them to a base. That is what keeps them lasting a lifetime.
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Products List
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Nakayama Koppa Lv 5+ (a3649)
DKK1,000.00 Inc. TaxDKK800.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 160mm 80mm 25mm -
Nakayama Koppa Lv 4,5 (a3648)
DKK1,000.00 Inc. TaxDKK800.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 130mm 110mm 12mm -
Nakayama Koppa Lv 5+ (a3647)
DKK1,000.00 Inc. TaxDKK800.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 155mm 90mm 25mm -
Nakayama Koppa Lv 5+ (a3646)
DKK1,875.00 Inc. TaxDKK1,500.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 180mm 125mm 30mm -
Nakayama Koppa Lv 4,5 (a3645)
DKK1,000.00 Inc. TaxDKK800.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 205mm 65mm 25mm -
Nakayama Koppa Lv 5 (a3644)
DKK1,000.00 Inc. TaxDKK800.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 190mm 63mm 23mm -
Nakayama Koppa Lv 5 (a3643)
DKK1,250.00 Inc. TaxDKK1,000.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 150mm 85mm 17mm -
Nakayama Koppa Lv 5+ (a3641)
DKK1,500.00 Inc. TaxDKK1,200.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 185mm 110mm 25mm -
Nakayama Koppa Lv 5+ (a3640)
DKK1,250.00 Inc. TaxDKK1,000.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 180mm 85mm 20mm -
Nakayama Koppa Lv 5+ (a3639)
DKK1,000.00 Inc. TaxDKK800.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 145mm 75mm 23mm -
Nakayama Koppa Lv 5+ (a3638)
DKK1,000.00 Inc. TaxDKK800.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 137mm 75mm 10mm -
Nakayama Koppa Lv 3,5 (a3637)
DKK1,000.00 Inc. TaxDKK800.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 137mm 80mm 15mm -
Nakayama Koppa Lv 5 (a3636)
DKK1,000.00 Inc. TaxDKK800.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 135mm 80mm 13mm -
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Nakayama Koppa Lv 5 (a3635)
DKK1,000.00 Inc. TaxDKK800.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 130mm 75mm 13mm -
Nakayama Koppa Lv 4 (a3634)
DKK1,250.00 Inc. TaxDKK1,000.00 Ex. TaxOld Stock Nakayama Koppa Koppa is unusually size, raw corners and smaller size Good way to try out Rare Nakayama stones Without any toxic inclusions or lines Max size: 220mm 90mm 7mm -
Nakayama Asagi Maruichi Kamisori Lv 4,5 (a3633)
DKK10,625.00 Inc. TaxDKK8,500.00 Ex. TaxSuper beautiful Nakayama from Maruichi Super clean and big stone ! Very rare that they come that big in Full size This one is super special as it is not often I get Nakayama Maruichi that can also be used for knives Super fine yet do not... -
Nakayama Asagi Maruichi Kamisori Lv 4 (a3632)
DKK10,625.00 Inc. TaxDKK8,500.00 Ex. TaxSuper beautiful Nakayama from Maruichi Super clean and big stone ! Very rare that they come that big in Full size This one is super special as it is not often I get Nakayama Maruichi that can also be used for knives Super fine yet do not... -
Blue Aoto (a3631)
DKK2,500.00 Inc. TaxDKK2,000.00 Ex. TaxGrit lv is approx. 2-5k make them super nice Naturals for pre polishers or even finishers for many knives.They are soft and very easy to make uniform finish with It is very hard to find very good Aoto stones as many of them with very hard inclusions... -
Oohira Lv 3,5 (a3623)
DKK4,375.00 Inc. TaxDKK3,500.00 Ex. TaxOld stock Ohira Fast and medium hardness stone quite easy to use feels very smooth and make some black very fastCan be used with or without Nagura and make clearer Kasumi finish No Toxic lines or Inclusions Very good Price for a huge... -
Oohira Namazu Lv 3 (a3622)
DKK3,750.00 Inc. TaxDKK3,000.00 Ex. TaxOld stock Ohira with Namazu pattern Fast and medium hardness stone quite easy to use feels very smooth and make some black very fastCan be used with or without Nagura and make hazy Kasumi finish No Toxic lines or Inclusions Very good...
