Stone&Strop
Menu

Gear guide

Best Shapton Sharpening Stones: Kuromaku vs Glass Stone

Picked from Amazon listings, not hands-on tests. How we pick

Shapton stones are splash-and-go: they do not need soaking, you spray or splash water on and start. They are hard, cut fast for their grit and dish slowly, which is why they are popular for Japanese knives and woodworking tools. The choice is between two lines. Kuromaku (Ha No Kuromaku, the Pro line) stones are about 15 mm thick and come in a plastic case that doubles as a base. Glass Stones are a thinner layer of abrasive bonded to a glass backing plate, so you get less stone for the money but a perfectly flat, rigid base and micron ratings printed on each grit. Within either line, the usual path is a coarse stone for repair (320), a medium for regular sharpening (1000 to 2000) and a finisher (5000 and above). This guide compares eight Shapton stones and sets not already in our Japanese knife guide.

As an Amazon Associate we earn from qualifying purchases. This does not change our picks. Affiliate disclosure

Top picks at a glance

Compare all picks

  • Closest match for the job

    Shapton Ceramic Kuromaku #1500 Whetstone

    1500 sits between a 1000 and a finisher, good as a single maintenance stone

    See price on AmazonSee it on Amazon

  • Most for the money on paper

    SHAPTON Ha No Kuromaku Whetstone D-set

    Covers repair, sharpening and finishing with three well-spaced grits

    See price on AmazonSee it on Amazon

  • Most complete listing

    Shapton GlassStone 1000 Whetstone, 50202

    1000 grit is the one stone most kitchen knives need most often

    See price on AmazonSee it on Amazon

Compare the picks

Facts are taken from each Amazon listing. Prices are checked daily and shown with their date.

The picks in detail

Pick 1 · Shapton

Shapton Ceramic Kuromaku #1500 Whetstone

See price on Amazon

Shapton Kuromaku K0707 #1500, 210 by 70 by 15 mm, a medium stone for knives that still have some bite, with a case that works as a base.

What the listing offers

  • 1500 sits between a 1000 and a finisher, good as a single maintenance stone
  • Plastic case doubles as a sharpening base
  • Listing says it can also be used as an oil stone

Limits to know

  • Slow on a very dull edge, start coarser in that case
  • One grit only, needs a finer stone for a polished edge
See it on AmazonListing title: Whetstone Sharpening Stone Shapton Ceramic KUROMAKU #1500 by Shapton

Pick 2 · Shapton

SHAPTON Ha No Kuromaku Whetstone D-set

See price on Amazon

Shapton Kuromaku D-set: #320 rough, #1000 medium and #5000 fine stones, a complete repair-to-finish progression in one purchase.

What the listing offers

  • Covers repair, sharpening and finishing with three well-spaced grits
  • Three stones from one line, so the grits step evenly from repair to finish
  • All three are splash-and-go, no soaking needed

Limits to know

  • Listing gives no detail beyond the grits
  • Large outlay if you only need a medium stone
See it on AmazonListing title: SHAPTON Ha No Kuromaku Ceramic Whetstone (D-set) - Rough & Medium & Fi...

Pick 3 · Shapton

Shapton GlassStone 1000 Whetstone, 50202

See price on Amazon

Shapton Glass Stone 1000 (11 micron class), 8.25 by 2.75 inches, the everyday medium stone of the Glass line, no soaking needed.

What the listing offers

  • 1000 grit is the one stone most kitchen knives need most often
  • Listing states it lasts longer than other waterstones
  • Splash-and-go with a flat, rigid glass backing

Limits to know

  • Thinner abrasive layer than a Kuromaku 1000, so it wears through sooner
  • Leaves a working edge, not a polished one
See it on AmazonListing title: SHAPTON GlassStone 1000 11micro class TYPE WA 50202

Pick 4 · Shapton

SHAPTON GlassStone 320 Whetstone 50301

See price on Amazon

Shapton Glass Stone 320 (40 micron class), no soaking needed, the coarse stone of the glass-backed line for repair and bevel setting.

What the listing offers

  • Glass backing keeps the stone rigid and flat
  • Micron class printed on the stone, 40 micron
  • Cheapest entry into the Glass Stone line

Limits to know

  • Thinner abrasive layer than a Kuromaku stone of the same grit
  • Coarse grit for repair, not everyday sharpening
See it on AmazonListing title: SHAPTON GlassStone 320 40micro class TYPE WA 50301

Pick 5 · Shapton

SHAPTON K0709 Blade Whetstone #320

See price on Amazon

Shapton Kuromaku K0709 #320, 210 by 70 by 15 mm, about 500 g: the coarse stone for chips, broken tips and reshaping a bevel.

What the listing offers

  • 320 grit repairs chips and resets a bevel far faster than a 1000 stone
  • Full 210 by 70 mm Kuromaku size for long knives
  • Splash-and-go: wet the surface and start, no soaking

Limits to know

  • Too coarse for regular sharpening, it is a repair stone
  • Listing gives size and grit only, no other detail
See it on AmazonListing title: SHAPTON K0709 Blade Blade, #320 Rough Blue Black

Pick 6 · Shapton

Shapton GlassStone 4000 Whetstone, 50103

See price on Amazon

Shapton Glass Stone 4000 (3 micron class), a fine stone that refines a 1000 edge for clean push-cutting on Japanese and Western knives.

What the listing offers

  • 4000 is a natural second stone after a 1000
  • Fine edge without going to a costly finishing grit
  • Glass backing stays flat and rigid under pressure

Limits to know

  • Listing is short on size and thickness detail
  • Fine grit only, needs a medium stone first
See it on AmazonListing title: SHAPTON GlassStone 4000 3micro class TYPE WA 50103

Pick 7 · Shapton

Shapton K0705#12000 Finish Cream

See price on Amazon

Shapton Kuromaku K0705 #12000 finishing stone, 210 by 70 by 15 mm, for a polished, glossy edge on razors and fine Japanese knives.

What the listing offers

  • 12000 grit gives a mirror polish and a very refined edge
  • Same full Kuromaku size as the rest of the line
  • Useful for straight razors as well as knives

Limits to know

  • A polish this fine adds little for most kitchen work
  • Needs a medium and fine stone before it to be worth using
See it on AmazonListing title: Shapton K0705#12000 Finish Cream

Pick 8 · Shapton

SHAPTON GlassStone 8000 Whetstone 50203

See price on Amazon

Shapton Glass Stone 8000 (1 micron class), 8.25 by 2.75 inches, a finishing stone for a polished edge on fine knives and tools.

What the listing offers

  • 1 micron class finish for a polished, very keen edge
  • Standard 8.25 by 2.75 inch Glass Stone size
  • Pairs with the 1000 for a classic two-stone setup

Limits to know

  • Higher price than most other 8000 grit stones
  • Listing gives only the size, no other specification
See it on AmazonListing title: SHAPTON GlassStone 8000 1micro class TYPE WA 50203

More gear for the choose your stones stage

Stone and Strop chooses every product independently from what its Amazon listing states. We may earn a commission from the links above. As an Amazon Associate I earn from qualifying purchases.