Iyoto KoKuro Aka (Small Black and Red) Medium Grit Japanese Natural Whetstone

This exceptional Japanese whetstone was selected by us and imported directly from Japan, thoroughly tested and sealed on stamped face and sides to protect the stone for long term use. 

It measures 155 mm (6.10 inches) long × 110 mm (4.33 inches) wide × 28 mm (1.10 inches) tall, and weighs 816 g (28.79 oz / 1.80 lbs).

Hardness: Hard/Fine
Newly mined Iyoto stone from Ehime. These Iyoto are considered Naka Toishi, or medium grit. They range in hardness and refinement capabilities with a wide range of potential performance characteristics depending on the type. There are 10+ different types of Iyoto which are currently being produced. This type is called Ko Kuro Aka or Black and Red. This piece displays a Vividly contrasting pattern and color scheme. A much more firm and fine example, which is typical for this type. This piece displays fine performance characteristics and can be used as a pre finishing stone for razors. Fine enough for knife edge finishing as it produces an edge with amazing tooth/bite. This piece displays a slightly granular yet fine feel when used with water only. When slurried, the cutting action increases and medium grit scratches removed quickly and efficiently. A solid medium grit to medium fine stone. can remove bevel setting scratches with forced slurry. Capable of finishing knives and some tools. A solid pre finishing stone when used with water only. 

A photo of the stone's polishing ability on soft and hard steels of a Japanese kitchen knife are shown.