Naniwa Pro 3k

Chosera Pro 3k 1

Naniwa Professional Seris 3k Waterstone

Being a long term user of Chosera stones, but having started out with the old Super Stones, I was anxious to try a few of the newly formulated stones. The Chosera line has been marked obsolete,  and the new Professional Series has taken it’s place. In the photo above, the stone on the left is the new 3k Professional, while on the right you can see my beloved and worn 3k Chosera.   

This new 3k Professional lapped easier than the 3k Specialty Stone I tested, and about the same as the 3k Chosera. Both responded similarly to my fingernail test before and after getting wet; a lot of pressure left no indentation.  I’m not sure why the SP stone seems to resist lapping to a greater extent. Perhaps the binder is more ‘slick’ and that helps is glide on the diamond plate better; that’s a wild guess, but I don’t have any other thoughts on it at the moment. 

The new  3k Pro stone seems a bit darker in color, but it has the same black flecks and white spots that the Chosera stone has. It’s 128 g lighter than the Chosera, presumably because it’s 2.0 mm thinner; same length/width though. 

In use, side by side with the 3k C, the 3k Pro has a technical edge. The scratch pattern is notable tighter and more consistent. I viewed this with a 4x loupe and was duly impressed. The bevel from the 3k SP stone was polished to a markedly higher degree with a significantly more mirrored surface but closer inspection indicates that the 3k Pro wins on consistency. Speed wise – the win goes to the 3k Pro. 

The feedback on the new Pro stone is, to me, better than the feedback from the Chosera 3k or the SP 3k; there seems to be an enhanced tactile sensation. It’s hard to describe but the sensation  is similar to what the 3k C provides, but it’s as if the feedback on the Chosera is more muted. These are subtle differences, and in my opinion - not necessarily indicative of quality or performance. 

I enjoy the SP 3k for being so light and polishing so well. The 3k Pro is seems faster and more efficient and somewhat harder under the blade. The SP 3k gives me the sensation that a knife’s edge might gouge it, but the 3k Pro does not, nor does the Chosera. 

From a simple straight razor honing standpoint, the 3k Pro might be overkill but it’s certainly a winner. Admittedly, I believe the 3k Specialty Stone would be perfect for most people that are only honing straights. Like the Chosera stones, these harder Pro stones are nice top-shelf options, but they are more expensive and the SP stones will get the job done just as well.   

For sharpening cutlery though, especially in a working environment, the Pro stones are the way to go; their resiliency and longevity would make them a must-have option. 

In closing, I don’t think anyone with a working 3k Chosera should dump it to buy the new Pro version. I don’t see how the marginal improvements and performance gains would be realized in real-time.  In other words, at the end of the day the edge will be the same. 

Approx. Dimensions: 8.3 x 2.75 x 0.8” / 211 x 70 x 20 mm

Weight: 27 oz / 764 g


© Keith V Johnson 2014 - 2018