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KOKU
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Community & Support

-Membership Services-

About KOKU Membership

By joining KOKU membership, you can enjoy the following benefits:

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Membership Card
Issuance

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Expert advice on
knife-related questions

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Discounts on sharpening
and engraving

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2nd floor cafe discount

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Various class discounts

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Member community
participation

About After-Sales Service

Sharpening Prices

Member Price

General Price

Home Knife (Santoku-Petty) 120mm~210mm

Bull Knife 240mm~330mm

Yanagiba 210mm~330mm

Out Edge 105mm~240mm

Thin Edge 195mm~240mm

Chinese Cleaver

Slicer

750円

1,120~1,870円

1,400~2,800円

1,400~2.800円~

1,870~3.270円~

1,400円

2,800~4,670円

880円

1,320~2,200円

1,650~3,300円

1,650~3.300円~

2,200~3,850円~

1,650円

3,300~5,500円

Chip Damage Repair Prices

Member Price

General Price

1mm chip damage

3mm or less chip damage

More than 3mm chip damage

基本工賃に含む

+330円(税込)〜

+550円(税込)〜

基本工賃に含む

+330円(税込)〜

+550円(税込)〜

Sharpening & Maintenance Methods

Sharpening Method

※For double-edged knives

step-1

1

Prepare the whetstone. Some whetstones need to be soaked in water, others just need water sprinkled on them. Place the whetstone on a wet cloth or stand to prevent it from moving.

step-2

2

Face the knife blade toward yourself, position at 45 degrees to the whetstone, place your fingers on the knife, lift the back (spine) of the knife, and maintain a 15-degree angle with the whetstone.

step-3

3

While maintaining the 15-degree angle, when the blade faces you, apply slight pressure when pushing and release pressure when pulling, moving your fingers and sharpening to the blade tip.

step-4

4

When you feel a burr with your fingertip, one side is complete.

step-5

5

Now switch hands, turn the blade away from you and sharpen the other side. This time, release pressure when pushing and apply slight pressure when pulling.

step-6

6

When you feel a burr with your fingertip as before, sharpening is complete.

step-7

7

Finally, remove the burr from both sides with newspaper, and wipe off moisture thoroughly.

Maintenance

step-1

1

After use, wash with a soft sponge and neutral kitchen detergent, rinse well with water, wipe off moisture and dry before storing.

step-2

2

Especially for steel, leaving salt or acid-containing dirt or storing in humid places for long periods can cause rust. After cutting pickles or lemons, wash off dirt promptly.

step-3

3

Sharpen at least 2-3 times per year to maintain good sharpness. However, serrated knives like slicers cannot be resharpened due to their structure.

step-4

4

If rust occurs, wash with cleanser on a sponge or resharpen with a whetstone. Hard scrubbers like steel wool may cause scratches.

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5

Especially steel knives rust easily, so after use, wash, dry, and finally apply camellia oil or blade oil (vegetable-based oil) to prevent rust.

step-6

6

Do not put in microwave or dishwasher. (Some all-stainless knives that are dishwasher-safe are exceptions.)

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About Various Customizations

Your preferred handle and knife sharpness can be customized as your unique original knife, one of a kind in the world.

Contact Us

Please allow up to 3 business days for a response.

If you do not receive a reply after 3 business days, please contact us again.

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