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Please note Naniwa recently changed the name of this stone from the Chosera 400 to the Naniwa Professional 400. In the never ending debate about which water stones are best, the Naniwa Chosera are a perennial contenders thanks to their outstanding performance. This 400 grit Chosera is hard, cuts quickly, and wears slowly. As the coarsest stone in the Chosera lineup the 400 is used for fast steel removal when repairing damaged edges, thinning knives, and resetting bevels. All Chosera stones are splash and go and the manufacturer recommends a quick soak. Don't perma soak these stones. The stone measures 210mm x 70mm x 20mm.
Product Reviews
Quick cutting, minimal soaking needed, November 11, 2018Posted By: Dave Conner - verified customer
Very happy, using this then bumping up to a 1k stone followed by the 2k green brick and finishing on the Richmond strop set up. 15-16 knives in and no cupping. Quick to make a fast cutting slurry, quick soak and cleanup in between knives. Super fast shipping, came well packaged and undamaged.
Very happy, using this then bumping up to a 1k stone followed by the 2k green brick and finishing on the Richmond strop set up. 15-16 knives in and no cupping. Quick to make a fast cutting slurry, quick soak and cleanup in between knives. Super fast shipping, came well packaged and undamaged.
Fast cutting stone, September 14, 2018 Nice Stone, April 28, 2017Posted By: Scott Walker - verified customer
I purchased this stone to use on very dull knives and damaged blades. The feel and feed back of this 400 grit stone is outstanding. I just finished setting the edge and sharpening a brand new inexpensive Chef's knife for my son. I was able to quickly create a burr with the 400, moved on to my Naniwa 800 and then to the Naniwa 3K. I was very pleased (and so was my son)with the quality and sharpness these three stone created on the blade edge. It was a pleasure to use.
I purchased this stone to use on very dull knives and damaged blades. The feel and feed back of this 400 grit stone is outstanding. I just finished setting the edge and sharpening a brand new inexpensive Chef's knife for my son. I was able to quickly create a burr with the 400, moved on to my Naniwa 800 and then to the Naniwa 3K. I was very pleased (and so was my son)with the quality and sharpness these three stone created on the blade edge. It was a pleasure to use.
Great Stone, April 20, 2017Posted By: Scott Walker - verified customer
This is an excellent stone. It is very aggressive, but smooth, with good feedback. Because of this I only use it to repair damage to a blade or set an edge on a very dull blade. I can then move on to my Chosera 800 and then to the 3K. The combination of these three stones gives me an edge on my Chef Knives that is truly amazing.
This is an excellent stone. It is very aggressive, but smooth, with good feedback. Because of this I only use it to repair damage to a blade or set an edge on a very dull blade. I can then move on to my Chosera 800 and then to the 3K. The combination of these three stones gives me an edge on my Chef Knives that is truly amazing.
Wonderful product, April 12, 2017 Positive Stone Review, January 31, 2017Posted By: Chef Mark - verified customer
See prior review on the naniwa/chosera 2000 grit. As noted, I saved up additional funds over the past month and purchased both the 400 and 800 grit chosera professional. Since I had already sharpened all my knives, I took 4 of my oldest paring knives and dulled the blades on the side of an old Arkansas stone. Starting from scratch, I progressed through the 400 to the 800 and finished on the 2000. After only a few minutes, I had obtained a shave-worthy edge on the paring knives with a mirror finish. Love the splash and go nature of the stones which transcends into an A+ rating on ease of use. Gave all three stones a resounding five star rating.
See prior review on the naniwa/chosera 2000 grit. As noted, I saved up additional funds over the past month and purchased both the 400 and 800 grit chosera professional. Since I had already sharpened all my knives, I took 4 of my oldest paring knives and dulled the blades on the side of an old Arkansas stone. Starting from scratch, I progressed through the 400 to the 800 and finished on the 2000. After only a few minutes, I had obtained a shave-worthy edge on the paring knives with a mirror finish. Love the splash and go nature of the stones which transcends into an A+ rating on ease of use. Gave all three stones a resounding five star rating.
cuts really good, December 26, 2016 Product Review, April 2, 2014Posted By: Tom?s - verified customer
Bought this stone as a rough grit to a AS kohetsu. Tried it today, and i was impressed how fast it cuts and that the edge that it leaves is not rough at all! I read somethings, and this is a splash and go, so when you buy it, don't soak, it may crack. I recommend it for everyone.Greetings,Tom?s
Bought this stone as a rough grit to a AS kohetsu. Tried it today, and i was impressed how fast it cuts and that the edge that it leaves is not rough at all! I read somethings, and this is a splash and go, so when you buy it, don't soak, it may crack. I recommend it for everyone.Greetings,Tom?s
Product Review, December 8, 2012 Product Review, September 25, 2012Posted By: Jon - verified customer
This stone is a beast. When I first got it, I set bevels and removed chips on over two dozen blades (mostly friends' neglected knives) before I began to notice the dishing. Very hard, cuts fast, dishes slowly. Excellent coarse grit stone, and feels smoother than 400 when you work with it.
This stone is a beast. When I first got it, I set bevels and removed chips on over two dozen blades (mostly friends' neglected knives) before I began to notice the dishing. Very hard, cuts fast, dishes slowly. Excellent coarse grit stone, and feels smoother than 400 when you work with it.
Product Review, May 4, 2012Posted By: Ozgur - verified customer
Chosera #400 is a hard and very dish resistant stone. It takes a little time to form slurry, but then it glides on yanagi's blade. You may first try this stone for setting bevels/minor repairs on yanagis before going to a rougher stone. I prefer this over Beston #500 on yanagi, because Beston frequently needs water and its abbrasives get cought up in front on shinogi line and scratches the flat part of yanagi.On deba knife, this stone feels a little rougher, because of deba's thick and narrow blade characteristics. For deba, I would prefer either Naniwa #150 or Beston #220, which Mark added lately. On the other hand, I would prefer it over Beston #500 on deba, as well. On double bevel knives, I don't like it much because the narrow blade road skids on the stone rather than bite into it. At the end, if you have space for another stone, buy it for single bevel knives to use it for light bevel setting/minor repair work or as intermediary stone between very rough and medium grit stones. Good stone.
Chosera #400 is a hard and very dish resistant stone. It takes a little time to form slurry, but then it glides on yanagi's blade. You may first try this stone for setting bevels/minor repairs on yanagis before going to a rougher stone. I prefer this over Beston #500 on yanagi, because Beston frequently needs water and its abbrasives get cought up in front on shinogi line and scratches the flat part of yanagi.On deba knife, this stone feels a little rougher, because of deba's thick and narrow blade characteristics. For deba, I would prefer either Naniwa #150 or Beston #220, which Mark added lately. On the other hand, I would prefer it over Beston #500 on deba, as well. On double bevel knives, I don't like it much because the narrow blade road skids on the stone rather than bite into it. At the end, if you have space for another stone, buy it for single bevel knives to use it for light bevel setting/minor repair work or as intermediary stone between very rough and medium grit stones. Good stone.
Product Review, March 19, 2012Posted By: Tim Armstrong - verified customer
Fantastic stone stone at a great price. Put a beautiful new edge on my Chroma knives that have taken a year and a half of heavy use without going over a low grit stone. This stone worked beautifully and I'm very glad to now have it in my maintenance line-up to give an older edge new life! Thank you Mark!
Fantastic stone stone at a great price. Put a beautiful new edge on my Chroma knives that have taken a year and a half of heavy use without going over a low grit stone. This stone worked beautifully and I'm very glad to now have it in my maintenance line-up to give an older edge new life! Thank you Mark!
Product Review, August 14, 2011Posted By: Arch_E - verified customer
As a woodworker, I'm looking for fast, effective ways to flatten blade backs and bevels. The Chosera 400 is truly a fabulous stone. It's very dish resistant, loads up but still continues to reestablish edges and sharpen without glazing. The Nagura included with it is highly helpful in creating a cutting slurry. This stone is not messy, produces a matte finish, and enables a 1000 grit stone to clean up the grind marks quite easily. If you're looking for fast working, long lasting, and a lot less messy stone, the Chosera 400 is the stone to get. I'm amazed no one else has commented. This stone ROCKS!
As a woodworker, I'm looking for fast, effective ways to flatten blade backs and bevels. The Chosera 400 is truly a fabulous stone. It's very dish resistant, loads up but still continues to reestablish edges and sharpen without glazing. The Nagura included with it is highly helpful in creating a cutting slurry. This stone is not messy, produces a matte finish, and enables a 1000 grit stone to clean up the grind marks quite easily. If you're looking for fast working, long lasting, and a lot less messy stone, the Chosera 400 is the stone to get. I'm amazed no one else has commented. This stone ROCKS!
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