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Professional grade for everyone! Rolling knife sharpener EDGBLACK Knife Sharpener Pre-order sales will start on November 16th on Makuake!

~A genuine whetstone that is not a sharpener and easily achieves real sharpness~.

サカイ販促サポート(Sakai Promotion Support)

Sakai Promotion Support (Location: Shibuya-ku, Tokyo; Representative: Takumi Sakai), an importer and seller of imported products, today announced that it will start pre-order sales of the "EDGBLACK Knife Sharpener," which can sharpen kitchen knives simply by rolling a roller, on "Makuake," a service to support and purchase atarashii things and experiences. The pre-order sales of "EDGBLACK Knife Sharpener," which allows users to sharpen kitchen knives by simply rolling them, began today, November 16, 2023 (Thursday) at 11:00 a.m.

EDGBLACK Knife Sharpener" project page (Makuake)

EDGBLACK Knife Sharpener

GIF of rolling and sharpening scene

Background of development

Summary of grinding stone and sharpener

EDGBLACK Knife Sharpener" is a knife sharpener that solves the demerits of existing knife sharpening methods (sharpener and whetstone) and multiplies their merits. The whetstone is difficult for beginners to handle, and the sharpener has the disadvantage that it tends to lose its sharpness easily, and there was no sharpening method that satisfied us. We came up with the idea of how anyone can easily sharpen knives like a pro, and the result is the "EDGBLACK Knife Sharpener," a product that "fixes the knife and rolls the whetstone to sharpen it.


(1) [Rolling and sharpening easily

Rolling sharpening scene

EDGBLACK Knife Sharpener sharpens knives using a roller for sharpening knives and an aluminum base with a neodymium magnet to keep the angle of the knife. This simplifies the knife sharpening process and improves the quality of the sharpening process.

(2) [Four angles

Four angles

EDGBLACK Knife Sharpener can sharpen knives at four different angles: 15°, 18°, 20°, and 22°. Basically, double-edged kitchen knives sharpened at an angle of 15 degrees will have better sharpness, and the blades will be less prone to chipping and last longer. However, it takes more time than usual to sharpen knives that have not been sharpened regularly to a 15° angle, so having four angles makes it possible to sharpen them in order, starting with the largest angle.

You can sharpen at an angle that suits your knife.

Since outdoor knives are designed to be used outdoors and require a sturdy blade, the blade is made at a loose angle, such as 20° or 22°. The EDGBLACK Knife Sharpener can sharpen the blade at the optimum angle for knives other than these special knives.

(3)[Anyone can sharpen knives like a pro

The EDGBLACK Knife Sharpener comes with a set of three different grinding stones.

Three types of replacement whetstones

The diamond wheel serves as a rough (#360) and medium (#600) grindstone for sharpening knives, and the ceramic wheel serves as a finishing wheel (#1000) for removing fine scratches and burrs (metal shavings that occur when sharpening the blade) from the diamond wheel.

By using these three types of whetstones and sharpening them in order from the lowest to the highest grain size, anyone can achieve professional sharpness. This sharpness is recommended not only for home use but also for professional cooks.

Dedicated box

All supporters who purchase this product will also receive an "EDGBLACK Knife Sharpener Exclusive Box," which is convenient for storage!

Please note that there is a possibility that the box will be changed to another box (e.g., paper box) when it is sold to the general public in the future.

About Returns (including tax and shipping)

16,660 yen (30% off): Super-early bird discount, limited to 50 EDGBLACK Knife Sharpener x 1

17,374 yen (27% OFF): Super Early Bird discount, limited to 100 EDGBLACK Knife Sharpener x 1

17,850 yen (25% OFF): Early bird discount, limited to 150 EDGBLACK Knife Sharpener ×1

32,368 yen (32% OFF): Super-extra early-bird discount set, limited to 50 EDGBLACK Knife Sharpener × 2

The price for the general public is 23,800 yen (including tax and shipping).

We are also preparing other returns, but we expect returns with high discount rates to run out of stock early.

■Project Outline

Project Name: Rolling wheel for easy, professional-grade finishing.

         A knife sharpener that specializes in ease of use

Period : November 16, 2023 (Thu) 11:00 - December 30, 2023 (Sat) 18:00


<Product Outline

Outline of the product

Product name: EDGBLACK Knife Sharpener

Contents: 1 roller, 1 base,

     1 replacement whetstone (#360, #600, #1000) × 1 each,

     EDGBLACK Knife Sharpener box x 1

Size: Roller approx. 5.7 cm (diameter) X 7.8 cm (height)

     Base: approx. 8.9 cm (length) X 8.4 cm (width) X 2.7 cm (height)

Material :Aluminum alloy

Sales location: Makuake

■Company Profile

Company name : Sakai Promotion Support

Representative : Takumi Sakai, President

Address : Shibuya Dogenzaka Tokyu Building, 10-8, Dogenzaka 1-chome, Shibuya-ku, Tokyo 150-0043, Japan

      Shibuya Dogenzaka Tokyu Building 2F-C, 1-10-8 Dogenzaka, Shibuya-ku, Tokyo

Establishment : July 2023

Business : Sales of imported products, online marketing support, etc.