Japanese natural coarse/medium/pre finish sharpening stone Iyoto.
Revived authentic Pure JP sword finisher.
super rare stone.
We offer just one stone at recently value.
Size 100-200, 200-300, 300-400, 500-600g etc. op. plate stone.

You may be received greater wight, if items are low stock status.
Weight ratio ;approx. 2.7g/cm³

It is random hand shape rectangle stones, and economy value.
Please assume the dimensions from ratio.

The diameter of round stone in first photo is 60mm.
The wood carton size is 260 x 500 x 45mm

10 times written number for each rectanglestone means weight in grams

eg)27 = approx. 270g.
Optional 25-50g slurry stones help making slurry and remove plugging up.
Suitable for Nagura, making slurry, handhold & general sharpening  plate stone. 

It is suitable for before awase sharpening.
Japanese TOGISHI sharpen a Japanese sword in this whetstone. 

We are not finished in finish sharpenning unless we finish NAKATOGI (Pre finishing work) carefully.
Iyoto is good at to remove a rust and scratch.

Nakatogi means finaly sharpening of the last but one.
Generally speaking, NAKATOGI is the most important sharpening. 
 

The scratch left by artificial stones is "V" gouge  section.
Natural left "U" gouge.
 

Artificial scratch is narrow but so deep.
Natural scratch is wide and shallow.
 

V is weak at stress and easy to chip.
U is strong  for  stress.
As you know at the end of slit of circle saw blade has round punching hole.
There is the same anti stress technique.
Because the sharpness lasts for a long time that finished by Natural!!
 

Then ,we must change the scratch shape in the medium  or  end of coarse grit stage.

Artifact is good at to gain abrasive power.  
Diamond is the best!!.
Natural is good at to gain performance .

Coarse Iyo is the best entry grit of U gouge scratch stones.
Fine Iyo is the better finishing stones and the sharpness lasts for a long time.

Iyo slurry has electro power ,and it is consist of metal silicate.
It suspend iron particles very well.
And the grit is shrunken as well as you sharpen.

Iyo has so wide grit range ,suspend iron particles ,contain water well.
Because the slurry of Iyo is the best Nagura stones.
Let's rub and making slurry on the harder finish slate stones.

If you feel falling down  the abrasive  power ,rub with diamond plate or small Iyo stones.
The power revivify  at easy.

Many profiles  are  there  in Iyo stones.
The factor are shown as ...

Hardness ,design pattern ,grit etc...

All Iyo contain the grit range between 500-6000#.
Individual stones covers 1000-3000 band width. so mysterious.

history

Iyoto was suitable for rough/medium sharpening of JP sword. 
Iyoto has been loved with the culture of the sword.
Once upon a time war happened well over a mine of Iyoto, too.

Nakaoka in IYO is a family which have been to dug for a long time.
I wrote a blog in my JP site.
Please refer to my blog.
If you have a question ,I can answer the authentic mine. 

Yes!
cleaned rust deposit.

  
The rust of  Jpn hand plane back hollow.
 rub! rub! rub!

Iyo become good nagura stone.
Iyo nagura can add to abrasion power ,If you try to use hardest smoot stone.
Please rub it!

Please look at both of movies.

Ohzuku super hard smooth stone.

Ohzuku super hard smooth stone with Iyo nagura.
beautiful crest!!! pow of  IYO

• If you seek for many quantities ,we can accept please click left icon and contact us.
• Freights estimated by Jp post page. *EMS* *SAL Registered*
  Calculated by Net weight from EXP.4,600yen/2Kg and SAL3,850yen/2Kg.
  You'll notice ,the freight estimation are discount well ,when you check JP post quotation tables!!