Wusthof Diamond Sharpener, Fine, Oval, 26 cm (10-inch) - 4483 Carbon Steel Do not attempt to sharpen

Do not attempt to sharpen the edge in any manner

so maybe they're on to something here

and is easily sharpened with any stone or hone or gadget suitable for fine Japanese knives

We recommend the fine ceramic hone listed below for everyday maintenance

ready for easy and quick refinement with a finer stone

Wusthof Diamond Sharpener, Fine, Oval, 26 cm (10-inch) - 4483 Carbon Steel Do not attempt to sharpenExcellent value in a diamond sharpener. If you want a diamond sharpener, in my opinion this is the way to go. It's coated with industrial diamonds in a "fine" grade, so you can really get a nice edge without risk of damage from too agressive cutting with a "coarse" version, and the long length and oval shape means you get excellent control and consistency with maximum efficiency (the oval design helps with additional surface area). Note: this does not