---
product_id: 3853584
title: "Seki Magoroku Diamond and Ceramic Sharpener (AP-0308), Black/White, 141 * 51 * 55 mm (Length X WidthX Height)"
brand: "kai"
price: "€ 37.52"
currency: EUR
in_stock: true
reviews_count: 13
category: "Kai"
url: https://www.desertcart.gr/products/3853584-seki-magoroku-diamond-and-ceramic-sharpener-ap-0308-black-white
store_origin: GR
region: Greece
---

# 3-stage sharpening tech Compact 5.6x2.0x2.2 in Authentic Japanese craftsmanship Seki Magoroku Diamond and Ceramic Sharpener (AP-0308), Black/White, 141 * 51 * 55 mm (Length X WidthX Height)

**Brand:** kai
**Price:** € 37.52
**Availability:** ✅ In Stock

## Summary

> 🔪 Sharpen smarter, slice sharper — your kitchen’s secret weapon!

## Quick Answers

- **What is this?** Seki Magoroku Diamond and Ceramic Sharpener (AP-0308), Black/White, 141 * 51 * 55 mm (Length X WidthX Height) by kai
- **How much does it cost?** € 37.52 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/3853584-seki-magoroku-diamond-and-ceramic-sharpener-ap-0308-black-white)

## Best For

- kai enthusiasts

## Why This Product

- Trusted kai brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Space-Savvy Design:** Compact footprint fits effortlessly in sink drawers or under counters—no clutter, all convenience.
- • **Effortless Knife Revival:** Restore razor-sharp edges in minutes, perfect for busy pros who demand peak performance.
- • **Durable Build Meets Sleek Style:** High-quality ABS resin body with transparent cover combines resilience and modern aesthetics.
- • **Triple-Action Precision Sharpening:** Diamond & ceramic whetstones deliver factory-edge sharpness without angle guesswork.
- • **Trusted by Knife Enthusiasts Worldwide:** Top-rated with 4.4 stars from 14,000+ users—join the community that refuses dull blades.

## Overview

The Kai Seki Magoroku Diamond and Ceramic Sharpener is a compact, triple-stage sharpening tool crafted in Japan. Featuring two diamond whetstones and one ceramic stone, it effortlessly restores knives to factory-sharp edges without angle adjustments. Lightweight and durable, it fits neatly in kitchen drawers and is highly rated by thousands of users for its ease of use and professional results.

## Description

Kai Seki Magoroku Diamond and Ceramic Sharpener (AP-0308)

Review: superb sharpener for the seki magoroku dual edge knives - 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 desertcart 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.
Review: Easy to use - Seems to work.

## Features

- You can easily rejuvenate the sharpness by using 3 types of whetstones (2 types of diamonds, ceramic), without having to adjust the angle yourself
- Compact size stores easily in sink drawers or under sink
- Size: 5.6 x 2.0 x 2.2 inches (14.1 x 5.1 x 5
- Weight: 3.6 oz (96 g)
- Materials: Main body: ABS (Acrylonitrile Butadiene Styrene) resin, Transparent cover: AS (Acrylonitrile Styrene) resin, ABS (Acrylonitrile Butadiene Styrene) resin, Elastomer resin, whetstone / Diamond whetstone / Ceramic whetstone / Country of Origin: Japan; This product is a double-edged product

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0061WZ7A4 |
| Best Sellers Rank | #110,025 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #376 in Knife Sharpeners #2,484 in Kitchen Knives & Accessories |
| Brand Name | KAI |
| Color | Black/White |
| Customer Reviews | 4.4 4.4 out of 5 stars (14,321) |
| Global Trade Identification Number | 04901601364118 |
| Grit Type | Coarse |
| Item Dimensions L x W x H | 5.55"L x 2.17"W x 2.01"H |
| Item Type Name | Knife sharpener |
| Item Weight | 3.36 ounces |
| Manufacturer | Kai |
| Material Type | Ceramic;Diamond |

## Product Details

- **Brand:** KAI
- **Color:** Black/White
- **Global Trade Identification Number:** 04901601364118
- **Grit Type:** Coarse
- **Item Weight:** 3.36 ounces
- **Manufacturer:** Kai
- **Material:** Ceramic;Diamond
- **Number of Items:** 1
- **Product Dimensions:** 5.55"L x 2.17"W x 2.01"H

## Images

![Seki Magoroku Diamond and Ceramic Sharpener (AP-0308), Black/White, 141 * 51 * 55 mm (Length X WidthX Height) - Image 1](https://m.media-amazon.com/images/I/41vhcRo5cDL.jpg)

## Available Options

This product comes in different **Pattern** options.

## Questions & Answers

**Q: What angle does this sharpen the blade to?**
A: I believe it's 22/23 degrees.  I love this for all my knives.

**Q: How many strokes through each slot?**
A: That depends on how dull you let your blades get. I steel my knives every other time I use them, so I only need to pass the blade (gently) through each slot 3 to 5 times. My KAI knives never let me down.

**Q: For best results, should the knife blade be 'sawn' back and forth or drawn repeated times in one direction only through the slot?**
A: According to the manufacturer's advise, the knife blade should be drawn repeated times in one direction only. Precisely speaking, from the end of hand holding part toward to the person holding the knife. Below is a video made by the manufacturer demonstrating how to sharpen a knife by using this sharpener:    

https://www.kai-group.com/fun/video/howtouse/hocho/153

**Q: Is this sharpener made in Japan?**
A: Yes. This product is made in Japan.

## Customer Reviews

### ⭐⭐⭐⭐⭐ superb sharpener for the seki magoroku dual edge knives
*by Z***Z on February 25, 2026*

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.

### ⭐⭐⭐⭐ Easy to use
*by A***R on January 18, 2026*

Seems to work.

### ⭐⭐⭐⭐⭐ Works well, sharpens my KAI knives!
*by G***K on December 13, 2023*

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!👍

## Frequently Bought Together

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-04-23*