Naniwa Diamond Whetstone Grit #3000 DR-7530

I sharpen daily my work knives (sushi chef) and got a 600 grit a couple of months ago. Recently got the 3k (and I have the 6k on the way). It's amazing on powdered steels, my main prep knife is a zdp sujihiki and my service knife is a blue steel super sujihiki and sg2 yanagiba. 600 is decently quick at getting a burr going vs my shapton (rockstar and kuromaki). The 3k gets it to a nice finish, both feel smoother than the grit but perform relative to the grit. The 3k tho loads up fast, so it's a constant clearing. Idk how I'll feel about the 6k. Its okie on vg10, I don't think it's worth it unless you have harder steel knives. I sharpen my coworkers knives, mainly vg10 and stainless steel (most likely aus10), it's good but I feel it's a waste to add wear on the stone. 500 grit Rockstar or kuromaki does quicker work on those, for a third of the price. Great stones for daily maintenance, it's part of my regime for my weekly sharpening as well. The stone is mainly base tho with the actual cutting surface like 1 or 2 mm thick. We'll see how long they last, they stay relatively flat vs other ceramic stones tho. I would get them again if they last me more than a couple of years of regular use. A bit pricey for the occasional use.

I ordered one of these 600grit resin bonded Diamond Stones for my knives made of modern super steels like my Bradford Guardian 4 M390 and my Benchmade Bugout S90V which are both hard steels. It seems to do really great with them. Has great feedback, great tactile feel and just like my Chosera ceramic stones i use for standard carbon steel knives it sharpens fast and seems really hard and slow wearing. I first had tried a Nanohone 1500grit resin bonded plate and it was an awfule stone that the binder used was too soft and didn't even do anything at all. The Naniwa is the way to go. Expensive yes, but also will last much longer than any CBN or plates with industrial Diamond sprinkled on top of adhesive smeared across a stainless steel plate. Which dont get me wrong those plates work great but do not last.

Great durability as they wear very slowly even tho they only have 1mm of resin layer on them. The value for your money tho isn't so great due to that 1mm of abrasive as with lapping every once in a while to keep them nice and perfectly flat you will wear that 1mm of resin down. These stones cut very nicely and consistent and work very well for super steels. The weight of the stone is nice and it sits stable on a stone holder or sink bridge nicely. The big issue with this stone and what makes me not like them is simply how badly they load up, with harder steels the load up is not terrible but it's still pretty bad but with softer steels forget about it as it will load up so quickly that it's insane and you will be having to use a conditioning stone on it non stop to keep it cutting and free or steel load up. The resin choice they used on these stones is the problem and they need to change it as that resin is what causes them to load up so quickly. So if you only sharpening harder steels 63+ hrc and you don't mind having to use a conditioning stone on them frequently to clean the load up out of them then they are a great performing resin stone that does leave a very nice and consistent finish. They aren't really fast cutting stones neither but also not what I would call slow, they cut reasonably quickly. For the money of 120-180 dollars a stone and only having 1mm of diamond/resin layer I just don't think they are a viable option as there is much better performing out there and with much thicker resin layers so they will last a long time and for basically the same money per stone. If you do get own the 1k is the best of the whole grit range and is the only one I would ever suggest anyone buy. The main issue with these stones is loadup but that's not a problem with a quality stone lubricant like Laceys stone lube/lapping fluid, it will totally halt stone loadup and that is these stones biggest issue so with that stone lube these stones become excellent performers. With just water or water and dish soap the loadup seriously detracts from the stone and is a hindrance that's annoying and slows your sharpening down as you are constantly having to condition the stone with a conditioning stone/nagura to clean the loadup out the stone as once it loadup up heavily and that will happen very quickly on softer steels and still pretty quickly even on harder steels the stone stalls out and practically stops cutting. 4 stars for performance 1 star for load up but with a good stone lube like lacey's stone lubricant and the load up problem is gone. 3 stars for value for your dollar due to the 1mm of abrasive layer. Ide rate them overall 4 stars (or 3 stars if not using a stone lube such as laceys) out of 5.

I sharpen knives everyday. it’s not my profession but I sharpen for myself, friends and family. This is the stone I use before moving to a finishing stone. If you don’t want or need a polished edge this stone would be great as the last stone in your sharpening progression. This stone cuts fast and leaves a beautifully consistent scratch pattern. You wouldn’t think it cuts as fast as it does by rubbing your fingers across it. The diamond resin coating is smooth and consistent. It loads faster than some other stones but cleans easily with a nylon brush and dish soap, and doesn't need flattening. It also comes with a dressing stone to remove any build up. I prefer to use the Naniwa flattening stone I purchased separately over the included dressing stone as that flattening stone is smoother than the included dressing stone and I think using the flattening stone will extend the life of this excellent stone. just use it, clean it occasionally and enjoy sharp edges. The technology used to make this stone is pretty incredible. If I had to pick one stone to sharpen with it would be this Naniwa 1K diamond resin. Gets the job done.

This stone is "feels" and sounds very different, in a good way. You don't feel the grit of the diamonds like my other stones, yet cuts even better with a finer scratch pattern. Doesn't make any sense, but you can see it in the results. It doesn't "feel" like the stone is doing anything, rather it feels almost smooth, especially for a 1000 grit. Yet when you look at the chisel or plane blade it is obvious that the cut is happening, and with a finer scratch pattern than my other two stones. Apparently, the resin bonding allows fresh diamonds to become available as the stone wears. Is it expensive, yes, but I feel that it will also last longer, and cut more consistently over a period of time. I plan on purchasing the other two diamond stones that Naniwa has to offer. If this one ever wears out, I'd buy another.

This is perhaps my favorite of the 3 Naiwa diamond-in-resin stones I have. It cuts quickly, and can roll a consistent burr back and forth across an edge. (The 400 grit is great. Fast cutting on the verge of being a little harsh - but awesome, and weirdly still quite smooth. - The 3000 grit stone in this line is soft, milk-smooth & very effective.) I am comparing these stones to the older 'Pro' Naniwa ceramic water stones in 600, 1200 & 3000 grit. I like sharpening on the splash & go stones, but the resin stones are objectively faster, and I think many people would prefer them, if they didn't mind the price.

Nice smooth almost satiny feel when sharpening. Is doing a fine job on several of my high vanadium steels and gives a very aggressive toothy edge. So far, M390, S90v, and CPM M4. The surface is harder than the Veneve diamond matrix stones I have here. Tried the dual grit system with a veneve 240F+240 JIS and the Naniwa 600 JIS grit and later the 600 on one side and 800F +2000P grit diamond veneve on the other. Very smooth cutting in cardboard and very long lasting edge. The 240/600 was more aggressive and rough cut but lasted even longer. I will order a Naniwa in 400 JIS for further testing. (All grits followed by only one swipe each on 1 micron diamond compound on very hard very old wood mounted razor strop. any more kills the effects). KnifeMaker

Quality and cutting performance is great. Unfortunately the actual cutting material is very minimal. I think the actual diamond resin is about 1mm thick. Honestly feels a little overpriced. Still functions great but definitely could be cheaper

Oh I like this. I like it very much!

I am a working professional and I've used many naniwa/shapton stones and I fell in love with this one quickly after first use. Tried this on a blue #2 yanagiba. Gave a very polished finish similar to a 3~5k grit stone and a smooth scratch patterns that are barely visible. I would just use this one stone only or maybe add a 3k if I need to make a second bevel.

Excellent item, works very well.

This sharpener is well made. Its key benefits are its flatness and fast cutting action. I bought it to flatten my brand new Japanese chisels, which did not take long with this fantastic stone.

This is the fastest cutting sharpening stone for the hardest modern steel like ZDP-189 or HAP 40. No problem to sharpen even ceramic knives ! Great update for advanced sharpeners.