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How to Make Your Japanese Knives Last Longer


Japanese knives are highly regarded for their precision, sharpness, and versatility in the kitchen. While they may be more delicate than some Western-style knives, this delicacy is a crucial advantage in certain kitchen tasks.

One reason for this is that Japanese knives are typically made from harder, more brittle steel than Western knives, which allows for a sharper edge and more precise cuts. This harder steel also allows for a thinner blade, making it easier to slice through delicate ingredients like fish or herbs without damaging them.

Another advantage of Japanese knives is their design. They often feature a thinner, more acute blade angle than Western knives, which allows for more precise cuts and greater control over the blade. A thin knife can be handy when filleting fish, slicing vegetables thinly, or performing other tasks requiring high precision.

Of course, like any knife, Japanese knives require care and attention to maintain their sharpness and durability. They should be stored properly, sharpened regularly, and used carefully to avoid chipping or breaking the blade. However, with proper care, a Japanese knife can be a valuable tool in any kitchen, allowing for greater precision and control in various tasks.

How to make your Japanese knives last longer

Do Japanese knives require more maintenance?

Japanese knives are typically made with harder steel than Western-style ones, making them more brittle and prone to chipping and breaking if not maintained properly. As a result, Japanese knives require more maintenance than other types of knives to keep them in good condition.

Regular maintenance of Japanese knives involves proper cleaning, sharpening, and storage. Always hand-wash Japanese knives with a mild detergent and dry them immediately. They should be sharpened regularly to maintain their sharp edge, using a sharpening stone or taking them to a professional sharpener. Additionally, it is important to store Japanese knives properly in a knife block, magnetic holder, or sheath to protect the blade and prevent damage.

With proper maintenance, Japanese knives can last for many years and offer excellent performance in the kitchen. However, if you take care of them properly, they can avoid becoming damaged and require more frequent maintenance or even replacement. So, while Japanese knives require a bit more maintenance, the extra effort is well worth it for their exceptional performance.

Japanese knives are often highly regarded for their sharpness and precision, but they can be more delicate than other types of knives. Here are some tips for making your Japanese knives last longer:

1. Hand wash and dry immediately

Japanese knives should always be hand-washed with a mild detergent and dried immediately. Avoid using the dishwasher or leaving the knives to soak in water, as this can damage the blade and handle.

2. Avoid cutting on hard surfaces

Japanese knives are typically made with harder steel than other knives, making them more brittle. Avoid cutting on hard surfaces like ceramic plates or glass cutting boards, as this can cause the blade to chip or crack. Instead, use wooden or plastic cutting boards.

3. Use the proper cutting motion

Japanese knives are designed for a specific cutting motion, with a push-pull technique that maintains the blade's edge. Avoid chopping or twisting the blade, which can cause it to dull or even break.

4. Sharpen regularly

Japanese knives should be sharpened regularly to maintain their edge. You can sharpen them yourself with a sharpening stone or take them to a professional for sharpening. Be sure to use the correct angle when sharpening the blade, which can vary depending on the type of knife.

5. Store properly

When not in use, Japanese knives should be stored in a knife block, magnetic holder, or sheath to protect the blade and prevent damage. Avoid storing them loose in a drawer, where they can become damaged or dull.

How to make your Japanese knives last longerHow do I keep Japanese knives from rusting and chipping?

Japanese knives are often made of high-carbon or Damascus steel, making them susceptible to rusting and chipping if not adequately cared for. To prevent rusting and chipping, here are some tips:

1. Hand-wash and dry immediately

Japanese knives should always be hand-washed with a mild detergent and dried immediately. Avoid using the dishwasher or leaving the knives to soak in water, as this can cause rust and damage to the blade.

2. Use a honing rod

Use a honing rod to maintain the edge of the blade between sharpenings. The honing rod helps keep the knife sharp and reduces the need for frequent sharpening, which can cause chipping if done improperly.

3. Store the knives properly

Store Japanese knives in a knife block, magnetic holder, or sheath to protect the blade and prevent damage. Avoid storing them loose in a drawer, where they can become damaged or dull.

4. Dry the blade thoroughly

After washing or using the knife, dry the blade thoroughly to prevent moisture from causing rust. Dry the blade using a soft cloth or paper towel, and store the knife in a dry place.

5. Oil the blade

To further protect the blade from rust, you can oil the blade with food-grade oil, such as mineral or camellia oil. Apply a thin coat of food-grade oil to the blade and use a cloth to distribute it evenly.

Following these tips can help keep your Japanese knives in excellent condition and extend their lifespan. With proper care, your Japanese knives can provide exceptional performance in the kitchen for years to come.

How to Make Your Japanese Knives Last Longer — Frequently Asked Questions

What's the single most important habit for keeping a Japanese knife sharp?

Cutting only on the right surface. Wood end-grain boards and soft poly boards are gentle on the edge; glass, marble, ceramic, granite, and stone counters chip and dull a Japanese edge within a few uses. If you do nothing else, switch your cutting board, and your knife will stay sharp three to five times longer than it would otherwise. Wash and dry the knife by hand after each use is a close second, but it's the cutting surface that does the most damage to most home knives. See our edge chipping guide for what surfaces to avoid.

How to minimize edge chipping on Japanese knives
How to minimize edge chipping on Japanese knives

Can I put a Japanese knife in the dishwasher?

No. A dishwasher is a perfect storm for kitchen knives: hot water and steam expand the wood and the steel at different rates (loosening handles), the alkaline detergent corrodes the blade and dulls the edge, and the knife clanging against other items in the rack chips the thin edge. Even one dishwasher cycle on a Japanese knife noticeably dulls it; a few cycles can crack a wa handle. Hand-wash with mild soap, dry with a towel, and put the knife away within a minute of finishing. It takes 30 seconds and adds years to the knife's life.

How often should I oil a carbon steel knife?

Light wipe-down with food-safe oil (camellia, mineral, or food-grade machine oil) every week or two if you use the knife regularly, more often if you live in a humid climate or near the ocean. The goal is a thin, almost invisible film, not a coating. After heavy use cutting acidic foods like tomatoes or citrus, wipe with oil before storage to protect the blade overnight. If a carbon steel knife sits unused for a few months, oil it before storing, then check it once a month for any rust spots that need light scrubbing with a wine cork or fine steel wool.

Corrosion vs. Oxidation
Corrosion vs. Oxidation

Does sharpening a knife shorten its life?

A tiny amount, yes — every sharpening removes a small layer of steel from the edge. But "shortening the life" is the wrong frame for it. A well-cared-for Japanese knife will be sharpened maybe four to eight times a year for 30 years and still have plenty of blade left at the end. What actually shortens a knife's life is over-aggressive sharpening (using a 220-grit stone every time when a 1000-grit would do) or repeated chip repairs because of bad cutting habits. Sharpening on a 1000- and 5000-grit stone with proper technique removes almost no steel.

How to Sharpen a Knife Using a Whetstone
How to Sharpen a Knife Using a Whetstone

What's the best way to store a Japanese knife between uses?

Three good options. A saya (wooden sheath) keeps the blade fully protected and is the traditional Japanese choice. A magnetic wall strip holds the blade by the spine, with no edge contact, and lets you see all your knives at once — popular in modern kitchens. A knife block with wide slots works as long as the slots don't scrape the edge as you slide the knife in. Avoid: loose-drawer storage, nylon roll-up cases that contact the edge, or "knife wallets" with tight pockets that scrape the bevel. Loose drawer storage is the single biggest cause of mysterious chips.

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About the author

Kei Nishida

Kei Nishida

Author, CEO Dream of Japan

info@japanesegreenteain.com

Certifications: PMP, BS in Computer Science

Education: Western Washington University

Kei Nishida is a passionate Japanese green tea connoisseur, writer, and the founder and CEO of Japanese Green Tea Co., a Dream of Japan Company.

Driven by a deep desire to share the rich flavors of his homeland, he established the only company that sources premium tea grown in nutrient-rich sugarcane soil—earning multiple Global Tea Champion awards.

Expanding his mission of introducing Japan’s finest to the world, Kei pioneered the launch of the first-ever Sumiyaki charcoal-roasted coffee through Japanese Coffee Co. He also brought the artistry of traditional Japanese craftsmanship to the global market by making katana-style handmade knives—crafted by a renowned katana maker—available outside Japan for the first time through Japanese Knife Co.

Kei’s journey continues as he uncovers and shares Japan’s hidden treasures with the world.

Learn more about Kei

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