SKU: 45998153413

Naniwa Chosera 600 Grit Japanese Waterstone With Stand

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Description

Naniwa Chosera 600 Grit Japanese Waterstone With StandProduct Description The Chosera is now a Japanese Domestic Market product only. It is is essentially the same as the PRO line (colour is identical between the Chosera and PRO, speed and feedback is also idencitcal) but thicker and comes with a Nagura (flattening stone), it represent a much better value than the new PRO, that is why the Japanese keeps the Chosera for their domestic market but not the PRO. K&S is determined to bring you the best from

Product Description

The Chosera is now a Japanese Domestic Market product only. It is is essentially the same as the PRO line (colour is identical between the Chosera and PRO, speed and feedback is also idencitcal) but thicker and comes with a Nagura (flattening stone), it represent a much better value than the new PRO, that is why the Japanese keeps the Chosera for their domestic market but not the PRO.  K&S is determined to bring you the best from Japan.

The Chosera (Cho: Super; Sera: Ceramic) stones are the best ceramic stones offered by Naniwa. These stones are designed for professionals who put the highest daily demands on their knives. Overall, these stones are best for those who don't have a lot of time to spend and need to quickly and cleanly sharpen their knives. Every Chosera sharpening stone is delivered with a special Nagura stone (67 x 49 x 25 mm) to put a fine sharpening paste on the surface of the Chosera stones during use. This 400 grit is excellent for establishing a new bevel angle or removing chips from the blade. Naniwa claims these are splash-and-go stones, but users say that soaking for a few minutes can further improve the sharpening quality. 

Size
The Naniwa Chosera Stones we carry are quite generously sized. The actual dimensions are 210 x 70 x 25mm This size is just about perfect for most knives and tools. The thickness of the stone undoubtedly adds to the incredible long wear of these stones. (Note: The 10,000 grit is actually a little thicker at 30mm or 1 3/16" thick.)

Grit
We stock the Naniwa Chosera Waterstones in the following grits: 400, 600, 800, 1000, 2000, 3,000, 5,000 and 10,000. While it isn’t necessary to own every single grit, we do recommend at least three to cover your coarse, fine and polishing needs. A good three grit set is the 400, 1000 and 5,000. The 10,000 grit is costly to produce and is therefore more expensive. If your budget allows, the 10,000 grit Chosera is a really great polishing stone for any edge. This high-end stone will quickly become a prized possession in the hands of an experienced sharpener. You'll truly appreciate the consistent feel and fast-cutting that all Chosera stones offer.

Bonding
What makes the Chosera different from other waterstones is the bonding. They call it Magnesia Bonding in comparison to their Resin bonding on the Naniwa Superstones. One of the main features of this process is greater density and consistency of finely graded abrasive particles. This gives the stone the fastest sharpening capability among our waterstones. Experienced users can really feel a difference with these stones.

Use
Soaking Chosera stones is optional. If you do soak, we recommend no more than 15 minutes. After soaking or wetting, use the included Nagura Stone to get the stone ready for sharpening. Now your stone is ready for sharpening. We do recommend keeping a spray bottle handy to keep the stones wet while sharpening.

Nagura Stone Included
An artificial Nagura Stone is included with each stone. The Nagura Stone is used to maintain the surface and to make a slurry prior to sharpening. It will also help maintain the flatness between lapping. Since each stone comes with its own Nagura Stone, you don’t have to worry about sharing grits with your coarse and fine stones.

Care
Like many products designed for the high-end user, the Naniwa Chosera stones require more care than your average stone. Unlike some waterstones, these are not to be left in water, leaving them in water will affect the bonding. When you are done, just let them air dry. Don’t try to speed up the drying process by exposing them to heat, just let them air dry so they can dry evenly. Store the stones only after they are completely dry. If this extra care is too much for you, we suggest you choose a different type of stone.

Includes
Each Naniwa Chosera Stone includes the selected stone and the Nagura Stone in a cardboard box. When purchased from us we also take the extra step to give it our "royal treatment" in packaging. These stones are valuable and we want to ensure that every stone arrives at your location in the same condition it was in when it left the factory.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 45998153413

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4.6 ★★★★★
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CamRam
Draper, US
★★★★★ 5
Asurion is AWESOME!
Ok, so let me start with the fact that you should NOT waste your time calling Amazon's customer service if you think you have a claim under Asurion's monthly protection plan. CALL ASURION! I wasted almost an hour with Amazon representatives that have absolutely no training in how the Asurion plan works, or even any idea if my item was covered. In fact, they told me the mechanized chair I purchased under the plan wasn't covered! Finally, my call got escalated to a manager who was just as clueless about my coverage, but had the best idea ever... call Asurion! The smartest thing I did that morning was hang up with Amazon, and reach out to Asurion as I should have done in the first place. Dealing with Asurion's customer service, after my Amazon call, was like being elevated to VIP status! 😄 Asurion's rep nicely took all my info, including the chair's purchase date and order number. Then they asked that I upload a couple of pictures of the product, along with a written description of the malfunction I had mentioned over the phone. This is where it gets really good. They told me they'd review the claim to determine if they'd send a repair specialist or reimburse me the cost of the item. In less than 48 hours, they determined that a payout was in order, and sent me an email that included an Amazon gift card for the total cost of the item minus the taxes I had paid, which I loaded directly into my Amazon wallet. Apparently, Asurion does not include the purchase taxes in their coverage. But, I can live with that. All in all, Asurion's claims division get a double thumbs up 👍🏽👍🏽, and the company gets big ups from me for not only standing behind their protection plan, but doing so expeditiously! Special note: If you buy a lot of stuff from Amazon, and have Asurion's monthly protection plan, scroll the item listing before pulling the trigger on your purchase... you need to see the green streamer that indicates your product is protected by the plan. If you don't see that, check to see if there are alternative products that might be covered. There are very few electronic or high ticket items that aren't covered, but looking for that green banner in the item description that says it's covered is key to foregoing any future headaches.
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Reviewed in the United States on April 26, 2026
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A. M. Bartolotti
Waukegan, US
★★★★★ 5
Glad to have Asurion Protection Plan!!! So easy to file a claim and get refunded!!!
I bought my ongoing protection plan about six months ago and had not used it for anything. About the same time, I purchased a small fountain for our front porch. A few weeks ago, the pump stopped working and I did everything I could think of to fix the pump, first check to see if the electrical outlet it had been plugged into still worked and it did. I then poured out all the water, added fresh water, then opened the pump to wash it out and remove any debris it had inside. There was none, and of course by now, the manufacturer's return date ended about four months ago. I was very nervous to submit a claim -- I was afraid I would get rejected, that I would have to pack up and return, or that I would be given 20 questions or more and provide mountains of paperwork to submit the claim. But it was surprisingly simple and easy, the person from Asurion was friendly and did her job incredibly well, my claim was created in their system in less than five minutes and I received a total refund minus the tax (turns out online retailer is not allowed to refund the tax because it was already paid to local and state governments. The cost of the fountain minus the tax was still about $165, which allowed me to upgrade to a much better water pump that had a higher output and also has something called "Burn Protection," ie overheating if the water level gets too low or if the pump gets plugged with debris. The total cost of the new pump was about $25 and has all kinds of amazing features as compared to the small fountain that didn't even have burn protection. I installed the new pump and it's working far better than the one that came with the fountain. Bottom line: I am so glad that I purchased the monthly protection plan from Asurion, and told my family how please I had it. They previously told me it was a waste of money and time because they wouldn't honor the claim. but they did, and I am so elated!
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Reviewed in the United States on February 13, 2026
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Verified Purchase
Heather Murphy
Charlottesville, US
★★★★★ 5
Stress and worry free with asurions complete protect plan
Absolutely thrilled with asurions complete protect plan. Worth every penny. My son is on the spectrum, and is very rough with devices, and I myself, am clumsy and go through devices more than the average person. Asurions comply protect plan, holds true and does exactly as promised. It feels so good to know, that next time a device breaks, I don't have to worry and stress over affording a replacement. Claims take literally 5 minutes to file, and I've not yet had an issue with anything not being covered. The only problem I ever had, was initially finding out how to contact them and file a claim. Which is simple. Don't contact Amazon, go to asurions direct website and follow the prompts. I highly recommend asurions complete protect plan, if you like removing stress from your life, and feeling a bit of security.
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Reviewed in the United States on April 18, 2026
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Andrew Giberson
Bozeman, US
★★★★★ 1
Worst company I’ve ever dealt with
This is probably the strongest version to use publicly because it stays factual, detailed, and angry without sounding unhinged. That’s what usually hits hardest with companies like Asurion because it reads like a documented timeline instead of just rage. I have never dealt with a more disorganized and concerning claims process in my life than what I experienced with Asurion regarding my DJI Mavic Mini Pro 5 drone claim. This entire nightmare started before the claim was even filed. For over TWO DAYS, multiple Asurion representatives insisted my product “wasn’t registered” and refused to process my claim. Meanwhile, Asurion’s own phone system literally states: “Great news, you no longer have to register your products.” Their own employees did not understand how their own system worked. I was transferred endlessly between departments, hung up on repeatedly, and even sent to Amazon support despite Amazon having nothing to do with the issue. It finally took speaking to a supervisor on the THIRD DAY for someone to admit they were wrong and manually file the claim. I mailed my drone on May 4th regarding a serious GPS/compass issue where the drone would unexpectedly drift or take off on its own while recording. Considering this is a nearly $2,000 flying device, this was obviously a major safety concern. Then things somehow got worse. On May 5th — less than 24 hours after receiving the drone — I got an email saying it had already shipped back to me. No repair details. No explanation. Nothing. When I called asking what repairs were actually performed, supervisor “CES” told me there were “no notes” explaining what had been done. She promised she would investigate personally and call me back within 24 hours. She never called back. On May 8th, after following up myself, another supervisor finally stated that the technician had “soldered/re-soldered” something on the drone. No explanation of WHAT was soldered. No detailed repair notes. No documentation. Nothing. This is a drone that had ZERO physical damage and had NEVER been crashed. I asked for written documentation of the repairs and was refused. I was told to “check the portal,” even though the portal contained absolutely no repair information whatsoever. Another supervisor apologized and promised to email me detailed information immediately. That never happened either. At this point, multiple supervisors had promised callbacks, documentation, and escalation reviews — and not a single one followed through. The drone arrived back while I was still on the phone with Asurion. I powered it on and immediately received compass calibration errors. The drone would not properly calibrate. So after all this, the drone STILL had issues. Instead of taking accountability, supervisor “Ryan” accused me of “chasing a reimbursement check,” which is insane considering Asurion themselves only offer two resolutions: repair or reimbursement. He repeatedly insisted that because I “received a service,” the issue was basically over. He refused to acknowledge my concerns regarding undocumented soldering repairs on a nearly $2,000 aircraft and ultimately hung up on me. Since then, the situation has only become more absurd. Some supervisors told me the situation was unacceptable and assured me I would likely be reimbursed if I mailed the drone back. Others told me they needed more photos, receipts, and serial numbers — despite the fact that all of this had already been submitted previously and somehow “disappeared” from their system. One representative demanded photos of a serial number physically located on the drone itself. I explained that DJI stores the serial information digitally through the controller/settings, something Asurion should absolutely know if they repair DJI drones professionally. That representative then refused to help me further and hung up. Days later, another representative suddenly approved a return shipping label anyway, making all the previous arguments and delays completely pointless. Now, after weeks of this chaos, I’ve been told by another supervisor not to even send the drone back yet because they “aren’t sure what they’re going to do.” I was explicitly told they may not repair it and may not reimburse it either. So to summarize: * Asurion employees didn’t understand their own registration system. * I was repeatedly hung up on and transferred around. * Multiple supervisors promised callbacks and never followed through. * My nearly $2,000 drone was “repaired” in under 24 hours with vague undocumented soldering work. * Nobody can tell me exactly what was repaired. * The drone still had calibration issues immediately after return. * Supervisors contradicted each other constantly. * Previously submitted documents mysteriously disappeared. * I was accused of “chasing a check” for wanting accountability regarding a failed repair. * I still don’t know whether they plan to repair, reimburse, or do nothing. This has been one of the most frustrating, unprofessional, and concerning customer service experiences I have ever dealt with.
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Reviewed in the United States on January 13, 2026
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Luce
Massapequa, US
★★★★★ 5
Excellent Support
Very easy to contact a real person and get solutions extremely quickly.
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Reviewed in the United States on May 12, 2026

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