Use properly, carefully
Our journey around the kitchen knife world has reached the final round.

This last round is about how to take care for kitchen knives, so we can use them for a long time.

Keeping the kitchen knife clean every day with regular maintenance to keep the sharpness, will allow you to use it for a long time.

Use it carefully every single day. By doing so, the kitchen knife will be an indispensable and irreplaceable item for everyone.

We will also introduce the disposal method when the kitchen knife has reached the end of its life, you can use it as a reference when the time comes.

Knife iconHow to Take Care of Kitchen Knife for Long-term Use

Even though your knife is a kitchen knife that is indispensable for everyday use, if you carefully use it with care, you will be able to use it for a long time.

In addition to daily care such as thoroughly washing and drying, if you feel that the sharpness is getting lesser, you should sharpen it.

If you continue to use it for many years with such care, your hands will be familiar with the knife to the point you will be able to feel a sense of unity with the knife, make it as if the cutting edge were your own fingertips.

If you are new to using kitchen knife, please use it carefully with care.
How to take care of knives

Optimal Care According To the Material

Do you know the material of your kitchen knife?

There are several materials used for knife blade. The method of care will be different according to the material.


There are two kinds of steel; blue paper steel and white paper steel. Famous for its sharpness but has disadvantage of easily get rusty. Therefore, regular maintenance is necessary.


Rust-resistant and durable. Before, even though stainless steel doesn’t get rust, it’s sharpness is still inferior compared to steel, so it was regarded as not suitable for business use.
In recent years, there are also many stainless knives with more sufficient hardness and toughness.


Ceramics knives are of non-metal zirconia ceramic material. It has excellence in hardness, sustained long-term sharpness, rust-resistant, and anti-odour transfer.
However, it is difficult to clean or sharpen it by yourself at home.
Because it lacks elasticity, to sharpen the knife we need diamond grinding wheels which need high speed rotation.
Japanese knife

Basic Care Method

No matter what kind of material is your knife made from, let’s avoid leaving it be after being used.

Even with kitchen knives that are hard to rust, if you don’t properly wash and dry it, the air may come into contact with ingredients and moisture the raw materials, causing oxidation and rust.

When you finish using the knife, let’s keep a good care of it with these steps:

・When you finish using the knife, wash thoroughly with dishwashing detergent or cleanser.
・Wipe off moisture thoroughly and dry it.

How to take care of knives

Sharpen It Regularly So You Can Use It For A Long Time

Since kitchen knife is used every day, it is inevitable that the sharpness will gradually drops even if you carefully clean it every day. It happened because of the jagged which attached to the cutting edge gradually disappears.

Therefore, we recommend you to sharpen your knife regularly. By sharpening your knife with a grindstone or whetstone, a small cut is attached to the cutting edge, and this jagged cuts the ingredients. Sharpness of the kitchen knife will improve greatly, and you will be able to notice that it does affects the taste and texture of the ingredients as well.

Even if you think that sharpening the knife is difficult, if you can start preparing the whetstone, you can start easily.

You should try to challenge yourself once.

If you want to know more about sharpening knives, please do read this article.

「Let's Learn About Knives - Extra Edition」How To Sharpen Kitchen Knife
Kitchen knife

In Case If You Want To Throw Away Your Knife

Even if you use your knife carefully with care, someday your knife will reach its lifespan.

When your knife can’t be sharpened anymore, or get rust or get broken, that’s might be the sign that it’s already the time for your knife to be replaced.

However, there are many people who don't understand how to dispose their old knives.

So, we will show you how to throw away your unusable knives.

This instruction is for disposing knives in Japan. Your country might have different way of disposing knives.
In Japan, there is also a method of requesting the collector of the unused item to collect your knives, but this time I would like to explain how to dispose your knives according to the local governments (in Japan).

Because it is a kitchen knife that you have used carefully, let's follow the rules of disposing the property properly.
How to take care of your knives
*houchou: Japanese language for knife.

Make sure of the trash classification

First, we must make sure which garbage type your knife is. How to dispose of kitchen knife varies depending on each local government, so the separation type may also different in your area.

Don’t forget to check in a brochure that describes how to separate garbage that is issued by your local governments as to which sorting type the kitchen knife belongs to. It’s likely belong to either 'metal', 'dangerous/hazard' or‘incombustible'.

Wrap the kitchen knife with paper and write specifically that it is a kitchen knife.

Once you know the sorting type, let's put it out as garbage on the trash collection day.

However, it seems that there are very few governments that is okay if you throw away your knife just like that. Most of the governments instruct you to use collecting bags or optional containers to clearly specify 'kitchen knife', 'knife' or 'dangerous goods' in order to show that there is a knife. This is a way to protect the garbage collector from getting injured by the knife blade.

You can also consider wrapping it using newspaper or cloth, so it won’t injure anyone. Or you can also roll the knife with newspaper and put a duct tape. You can use either newspaper or unused cloth. Make sure that the knife won’t jump out from its wrapper.
For those who wants extra safety, you can put the kitchen knife into a paper bag, fold it and wrap it up with duct tape.

It is also okay to put it inside a collection bag or any container and write specifically on the bag or container that it contains unused kitchen knife.

Please be careful to not to put out the garbage in the state that the part of the blade is exposed.

We already briefly described about the method of care and disposal of kitchen knife.

If you want to know more about 'sharpening', please check: 「Let's Learn About Knives - Extra Edition」How To Sharpen Kitchen Knife

With this, our journey around the kitchen knife world will be finished.

Thank you for reading until the end.

Kitchen knife can be said as a precious partner of cooking.

We will be happy if our article able to serve you a lot of knowledge about knives.