I've just discovered some new info to pass on to you KS freaks (at least it's new news to me).
I've recently been recalling this thread from Fred's from a coupe of years ago that Chris Lehrer started about a clad blade in Masamoto's catalog. He was questioning why the same knife made with san mai construction is more expensive that the mono-steel version.
As it turns out, Masamoto does make a clad version of the KS wa-gyuto, the KS29xx sereis. The KS31xx sereis is the mono-steel version. I e-mailed Koki, and these are his replies;
Thank you very much for your inqiury and interest.
Yes. Today we just confirmed information about below items.
KS-3124 Wa Gyuto 240mm (Solid White Steel #2 blade)
HRC 61 to 62
Blade Spine Thickness 3mm
KS-2924 Wa Gyuto 240mm (San-Mai, Cladding blade. Blade core White Steel #2)
HRC 62 to 63
Blade Spine Thickness 4.3mm
Masamoto explains both of above knives are through traditional hammer forging proces. Masamoto explains KS-2924 Wa Gyuto 240mm has thicker blade, and has higher HRC. (Also KS-2924 has higher price too)
Yes. From the Masamoto’s information KS-2924 has same blade shape as KS-3124.
The KS-2924 has Cladding blade, blade core is made of White Steel #2 sandwiched with soft iron. The entire blade has possibility to get and discolor, also especially the blade core part has possibility to get discolor from the acid ingredients foods such as onion, lemon.
So the KS31xx and KS29xx have the same profile. And interesting to discover that the KS31xx series are hand forged (did not know), not cut and ground from bar stock, the way most all other mono-steel knives I'm familiar with are made. That would explain a slightly higher cost over a similar mono-steel knife from another company.
Just sharing the love. Cheers! mpp