Whetstones

Oboro Knife

The newest NSK series, Oboro Knife was designed specifically for kitchen knives, and are very effective on a wide variety of steels for a wide variety of services. The abrasives in Oboro Knife tend to cut deeper and faster than other NSK lines, thus they are the most ideal series for full-blade servicing such as thinning, repairing, and reprofiling. Ideal for seasoned to advanced users.

Oboro Knife grits are: 200, 400, 800, 2000, 4000, 6000

Brand: NSK Kogyo Ltd.
Thickness: 3.5mm
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g
Grit Range: #800

Nagura

Nagura are very helpful in both increasing the efficiency of metal removal by adding grit on top of the stone, but also in creating unique, multi-grit slurry combinations important for polishing purposes. They can also be used to condition the surface of the sharpening stone after using a flattening plate or after extended periods of sharpening to remove particulate.

Brand: NSK Kogyo Ltd.
Length: 40mm
Width:18mm
Height:15mm
Weight: 18g
Grit Range: #12000

Nagura

Nagura are very helpful in both increasing the efficiency of metal removal by adding grit on top of the stone, but also in creating unique, multi-grit slurry combinations important for polishing purposes. They can also be used to condition the surface of the sharpening stone after using a flattening plate.

Brand: NSK
Length: 40mm
Width: 18mm
Height: 15mm
Weight: 18g
Grit Range: #400

Oboro Knife

The newest NSK series, Oboro Knife was designed specifically for kitchen knives, and are very effective on a wide variety of steels for a wide variety of services. The abrasives in Oboro Knife tend to cut deeper and faster than other NSK lines, thus they are the most ideal series for full-blade servicing such as thinning, repairing, and reprofiling. Ideal for seasoned to advanced users.

Oboro Knife grits are: 200, 400, 800, 2000, 4000, 6000

Brand: NSK Kogyo Ltd.
Grit Range: #4000
Thickness: 3.5mm
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g

Oboro Knife

The newest NSK series, Oboro Knife was designed specifically for kitchen knives, and are very effective on a wide variety of steels for a wide variety of services. The abrasives in Oboro Knife tend to cut deeper and faster than other NSK lines, thus they are the most ideal series for full-blade servicing such as thinning, repairing, and reprofiling. Ideal for seasoned to advanced users.

Oboro Knife grits: 200, 400, 800, 2000, 4000, 6000

Brand: NSK Kogyo Ltd.
Thickness: 3.5mm
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g
Grit Range: #2000

Kyokuha

The original NSK Kogyo diamond stone series, Kyokuha are built for ease of use and compatibility with a wide variety of steels from carbon, stainless, powder, even tool steel. It has a large selection of grits to fit almost every user's needs. These are the softest of the NSK series and probably easiest to learn sharpening and polishing. I

Recommended for beginners and seasoned users, or those who simply prefer softer stones.

Kyokuha grits: 200, 300, 400, ~500 to ~600, 800, 1000, 1500, 2000, 3000, 4000, 8000, 10,000, and 16,000

Brand: NSK
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g
Grit Range: #400

Flattening Stones

Although all NSK stones are very wear resistant, these flattening/dressing stones are specifically formulated to counter the wear resistance and flatten at an impressive speed. They also work very well on natural stones as well, and the higher grit flattening plates will leave a scratch-free surface unlike many other diamond plates. The flattening stones are slotted to eliminate suction when rubbing against the sharpening stone.

If needed, coarser flattening grits can initially be used on higher grit sharpening stones to remove material quickly, as long as you condition the surface of the sharpening stone with a higher grit flattening plate before use in order to prevent overly-aggressive surface. Each grit of the flattening stones can be used on several different grits, so there is no need to get every single flattening grit for each corresponding grits of NSK sharpening stone you may have; see recommended grit ranges for each flattening stone below.

Flattening grits: 200, 400, 600, 1000, 3000, 6000

Recommended Use: Flattening grits from 200-1000 can be used on All NSK sharpening stones up to 1500 grit. All NSK sharpening stones with grits above 1000 should ideally be flattened with a grit as close to the stone's grit as possible. For example, a 3000 grit sharpening stone should be flattened with grits 3000 and above.

Brand: NSK
Length: 200mm
Width: 75mm
Height: 17mm
Weight: 468g
Grit Range: #6000

Oboro Knife

The newest NSK series, Oboro Knife was designed specifically for kitchen knives, and are very effective on a wide variety of steels for a wide variety of services. The abrasives in Oboro Knife tend to cut deeper and faster than other NSK lines, thus they are the most ideal series for full-blade servicing such as thinning, repairing, and reprofiling. Ideal for seasoned to advanced users.

Oboro Knife grits: 200, 400, 800, 2000, 4000, 6000

Brand: NSK Kogyo Ltd.
Thickness: 3.5mm
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g
Grit Range: #6000

Hakuto 2

Medium hardness, they are ideal for creating softer bevel changes and finishing full convex grinds. Given the available grits are only medium to high grit, Hakuto 2 stones are best left for use after initial, coarser work has been completed.

Recommended for advanced users.

Hakuto 2 grits: 3000, 3000S, 6000, 6000S, 10,000

Brand: NSK
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g
Grit Range: #3000

Kyokuha

The original NSK Kogyo diamond stone series, Kyokuha are built for ease of use and compatibility with a wide variety of steels from carbon, stainless, powder, even tool steel. It has a large selection of grits to fit almost every user's needs. These are the softest of the NSK series and probably easiest to learn sharpening and polishing. I

Recommended for beginners and seasoned users, or those who simply prefer softer stones.

Kyokuha grits: 200, 300, 400, ~500 to ~600, 800, 1000, 1500, 2000, 3000, 4000, 8000, 10,000, and 16,000

Brand: NSK
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g
Grit Range: #800

Kyokuha

The original NSK Kogyo diamond stone series, Kyokuha are built for ease of use and are effective on a wide variety of steels from carbon, stainless, powder, even tool steel. It has a large selection of grits to fit almost every user's needs. These are the softest of the NSK series and are ideal for beginners and seasoned users.

Kyokuha grits are: 200, 300, 400, ~500 to ~600, 800, 1000, 1500, 2000, 3000, 4000, 8000, 10,000, and 16,000

Brand: NSK Kogyo Ltd.
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g
Grit Range: #200

Kyokuha

The original NSK Kogyo diamond stone series, Kyokuha are built for ease of use and compatibility with a wide variety of steels from carbon, stainless, powder, even tool steel. It has a large selection of grits to fit almost every user's needs. These are the softest of the NSK series and probably easiest to learn sharpening and polishing. I

Recommended for beginners and seasoned users, or those who simply prefer softer stones.

Kyokuha grits: 200, 300, 400, ~500 to ~600, 800, 1000, 1500, 2000, 3000, 4000, 8000, 10,000, and 16,000

Brand: NSK
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g
Grit Range: #1000

Flattening Stones

Although all NSK stones are very wear resistant, these flattening/dressing stones are specifically formulated to counter the wear resistance and flatten at an impressive speed. They also work very well on natural stones as well, and the higher grit flattening plates will leave a scratch-free surface unlike many other diamond plates. The flattening stones are slotted to eliminate suction when rubbing against the sharpening stone.

If needed, coarser flattening grits can initially be used on higher grit sharpening stones to remove material quickly, as long as you condition the surface of the sharpening stone with a higher grit flattening plate before use in order to prevent overly-aggressive surface. Each grit of the flattening stones can be used on several different grits, so there is no need to get every single flattening grit for each corresponding grits of NSK sharpening stone you may have; see recommended grit ranges for each flattening stone below.

Flattening grits: 200, 400, 600, 1000, 3000, 6000

Recommended Use: Flattening grits from 200-1000 can be used on All NSK sharpening stones up to 1500 grit. All NSK sharpening stones with grits above 1000 should ideally be flattened with a grit as close to the stone's grit as possible. For example, a 3000 grit sharpening stone should be flattened with grits 3000 and above.

Brand: NSK
Length: 200mm
Width: 75mm
Height: 17mm
Weight: 468g
Grit Range: #600

Hakuto 3

The softest in the Hakuto series, they are the most similar of the Hokuto stones to feeling like soft, muddy natural stones. Like Hakuto 2, they are ideal for creating softer bevel changes and finishing full convex grinds.  Given the available grits are only medium to high grit, Hakuto 2 stones are best left for use after initial, coarser work has been completed.

Recommended for advanced users, or for users who prefer the feel of of natural stones that are not as hard as Oboro Knife.

Hakuto 3 grits: 3000, 6000, 10,000

Brand: NSK
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g
Grit Range: #12000

Hakuto 2

Medium hardness (harder than Hakuto 3, softer than Hakuto 1), it is ideal for blending in smooth transitions on bevels or grinding in full convex grinds (as opposed to crisp lines like a Shinogi). Ideal for advanced users.

Hakuto 2 grits: 3000, 3000S, 6000, 6000S, 10,000

Brand: NSK Kogyo Ltd.
Length: 200mm
Width: 75mm
Height: 26.5mm
Weight: 740g
Grit Range: #6000 S (Soft)