Seki Magoroku Diamond and Ceramic Sharpener (AP-0308), Black/White, 141 * 51 * 55 mm (Length X WidthX Height)

after 4 mo of use, my Kai wakatake ko-santoku needed to be honed or sharpened, and I was about to buy a whetstone setup and heard about this quick solution. i used it per instructions using google translate on the japanese, as well the amazon review instructions, and its now factory sharp, but I tried honing it only, not sharpening. when the knife was brand new, it would cut a ripe tomato without any slicing motion, simply pushing the knife onto the tomato would cut it, it now does that easily once again, see the video. compared to a generic ceramic knife that wouldn't cut without a sawing action. note the 2, 3 slots on the sharpener are coarse and fine honing stones, while #1 is a sharpening stone, and so far, my knife only needed honing, so not needing sharpening will easily prolong the life of the knife. every seki magoroku owner should own this sharpener, its needed eventually and I was dreading having to become a knife hobbyists and learning how to use multiple whetstones to get the legendary japanese knife sharpness, and kai has made it easy for those of us who just want a sharp knife, not becoming a blade expert. the design is easy to grip, speedy to use, of very high build quality despite its plastic body, and solidly made. would not hesitate to buy it again as some reviews say the stone wear out with use.

Seems to work.

Works as promised, sharpens my KAI knives like a charm. Easy to use, just slide the knife on the slots. Slot 1 is the diamond sharpener for dull blades, slot 2 is the ceramic to correct the angle and slot 3 is to smoothen, finish the edge. Use the sharpener without water, since it is a dry method sharpening. Directions are in Japanese, but just used Google translate to get it in English. Highly recommended!👍

Works great, but one design flaw. The sharpener slides in and out of the clear section. When extended, the black section moves around fore and aft inside the clear section. This sometimes will cause the knife being sharpened to be pulled back in an angle relative to the sharpening elements. Three sharpening elements do work well, and correct angle for my Shun knives.

This is a very easy pull through sharpener for Japanese knives. Got these to touch up my Shun knives between proper sharpenings. Pull 10 times through 1, 10 times through 2, and 5 times through 3 ... then give the blade a quick wash to rinse off any metal. Quick and easy. Size fits nicely in the drawer, and price can't really be beat.

It’s so easy to use, but the result is very phenomenal. This makes sharpening kitchen knives much more fun. I will sharpen my kitchen knives more often for sure.

Not hard to use just run the blade from right to left on each stone 10 times. You don't have to push down really hard on the stones. if you do you might end up breaking it. Great at sharpening most blades.

Easily the best touch-up sharpener that I've ever owned. Use the wet stones much less with this around! Great product!

Très bon produit

Sharp knives every time. Glad I found this.

Knife sharpener. My knife feels sharper than before. Just follow 3 steps and easy to go!

Excellent sharpener, my Japanese knives are razor sharp again! Takes little space when folded, very practical and a nice price

GUT, Es funktioniert gut und einfach.