How should I clean and dry my Japanese knife after every use?

Clean your Japanese knife by hand immediately after use, then dry the blade, edge, spine, heel, and handle completely before storing it. Do not leave it in the sink, do not soak it, do not air-dry it, and never put a Japanese knife in the dishwasher. This simple routine protects the sharp edge, prevents rust, reduces staining, protects the handle, and keeps the knife safer to use.

Japanese Knife Company recommends washing sharp knives by hand with very hot water and washing-up liquid, while keeping the edge facing away from the cleaning hand. JKC also clearly warns that dishwashers can damage sharp steel edges, cause irreparable damage, and void the guarantee. For Aogami, Shirogami, High Carbon, and other reactive carbon steel blades, the knife should also be dried immediately and lightly oiled after use because these steels can oxidise.

The safest daily cleaning routine

Use this routine every time you finish using your Japanese knife:

  1. Wipe the blade during prep if needed. If you are cutting wet, acidic, or salty foods such as tomatoes, lemons, onions, vinegar-based foods, fruit, fish, or cured ingredients, wipe the blade during use so food residue does not sit on the steel.
  2. Wash the knife by hand. Use warm or hot water and mild washing-up liquid. Clean both sides of the blade carefully with a soft sponge, cloth, or suitable non-abrasive scourer.
  3. Keep the edge away from your hand. Hold the knife safely and keep the cutting edge facing away from the cleaning hand to reduce the risk of slipping onto the sharp edge.
  4. Do not soak the knife. Never leave a Japanese knife sitting in a sink or bowl of water. Soaking can damage the blade, handle, tang, and edge, and it also creates a serious safety risk.
  5. Rinse the knife fully. Remove all soap, salt, acid, food residue, and moisture from the blade and handle area.
  6. Dry immediately with a clean towel. Dry the blade faces, cutting edge area, spine, heel, bolster or ferrule area, handle, and the point where the blade meets the handle.
  7. Oil carbon steel if required. If your knife is Aogami, Shirogami, High Carbon, or another reactive carbon steel, apply a very thin layer of suitable oil after drying.
  8. Store only when fully dry. Use a blade cover, wooden saya, knife guard, magnetic rack, magnetic block, knife stand, or chef’s case. Do not store the knife loose in a drawer.

Why drying matters as much as washing

Drying is one of the most important parts of Japanese knife care. A knife can be washed correctly but still rust, stain, or suffer handle damage if it is left damp after cleaning.

Water can sit near the heel, handle joint, rivets, tang, ferrule, or blade cover. This is especially risky for carbon steel Japanese knives, but even stainless steel knives can develop marks or corrosion if they are left wet for too long.

After washing, do not leave the knife in a drying rack. Do not let it drip-dry. Do not place it straight into a blade cover while damp. Dry it fully with a towel before storage.

How to dry a Japanese knife properly

  1. Place the knife on a stable surface or hold it securely by the handle.
  2. Use a clean, dry towel.
  3. Dry one side of the blade carefully.
  4. Turn the knife safely and dry the other side.
  5. Dry along the spine and heel area where water often hides.
  6. Dry the handle, ferrule, rivets, and tang area if visible.
  7. Check the blade under light before storing. If you can see water spots, dry again.

For carbon steel knives, drying should be immediate. Even a short period of moisture on the blade can cause staining or oxidation, especially if the knife has been used on acidic or salty foods.

Cleaning routine by knife steel type

Knife steel Cleaning method Drying requirement Extra care
Stainless steel Hand wash with mild washing-up liquid and warm water Dry immediately More rust-resistant, but still not rust-proof if left wet or dirty
VG10 / AUS10 Hand wash only, avoid harsh scrubbing and dishwasher cycles Dry immediately Good everyday care is enough for most users
SG2 / R2 powder steel Hand wash gently to protect the edge and finish Dry immediately Premium steel still needs careful storage and proper cutting surfaces
Aogami / Shirogami / High Carbon Hand wash quickly after use, especially after acidic or salty foods Dry immediately and thoroughly Oil the whole blade after every use if required by the product care instructions
Damascus-style blades Hand wash gently to protect the patterned finish Dry immediately Care depends on the core steel, so check the individual product details

After cutting acidic, salty, or wet foods

Some ingredients are more likely to stain or react with Japanese knife steel, especially carbon steel. After cutting these foods, clean and dry the knife quickly:

  • Lemon, lime, orange, grapefruit, and other citrus
  • Tomatoes and tomato-based foods
  • Onions, garlic, shallots, and leeks
  • Vinegar, pickles, and fermented foods
  • Apples, pears, pineapple, berries, and juicy fruit
  • Salted, cured, or brined ingredients
  • Raw fish, cooked fish, meat, and poultry

If you are preparing a long meal, keep a damp cloth and a dry towel nearby. Wipe the blade if food residue builds up, then dry the knife before putting it down for more than a few minutes.

How to oil a carbon steel Japanese knife after cleaning

If your knife is Aogami, Shirogami, High Carbon, or another reactive carbon steel, oiling helps reduce oxidation after cleaning and drying.

  1. Wash the knife by hand.
  2. Dry the whole knife completely.
  3. Add a tiny amount of suitable knife oil, camellia oil, or appropriate food-safe oil to a soft cloth.
  4. Wipe a very thin layer over the blade surface.
  5. Do not leave the knife wet or greasy. The layer should be light and even.
  6. Store the knife safely only after it is dry and protected.

You can explore Japanese Knife Company’s knife care oil accessories if your knife requires oiling.

What not to do when cleaning a Japanese knife

  • Do not put it in the dishwasher. Dishwasher detergent, heat, water pressure, and contact with other items can damage the edge, handle, and blade finish.
  • Do not leave it in the sink. A hidden sharp edge in soapy water is dangerous, and soaking can damage the knife.
  • Do not air-dry it. Water left on the blade can cause spotting, staining, rust, or oxidation.
  • Do not use harsh abrasives on fine finishes. Aggressive scrubbing can scratch polished, Damascus, hammered, or specialist blade finishes.
  • Do not clean toward your hand. Keep the edge facing away while washing.
  • Do not store it while damp. Moisture trapped inside a blade cover, saya, or drawer can cause corrosion.
  • Do not leave acidic food on the blade. Acidic and salty foods can speed up staining and rust.

Should I clean the handle too?

Yes. The handle should be wiped and dried as carefully as the blade. Moisture can collect where the blade enters the handle, around rivets, around the ferrule, or near the tang. Over time, trapped moisture can affect handle materials and the blade connection.

This is especially important for traditional Japanese handles, wooden handles, and knives used in busy kitchens where water and food residue can build up quickly.

What if I forgot to dry the knife?

If you forgot to dry the knife, check it immediately.

  1. Wash off any food residue.
  2. Dry the blade and handle fully.
  3. Look for grey, orange, brown, black, or rough marks.
  4. If it is carbon steel, oil the blade after drying.
  5. If you see reddish-brown rust, treat it early with suitable rust-removal care.

Light staining or patina on carbon steel can be normal. Reddish-brown, rough, flaky, or spreading marks are more likely rust and should be treated quickly. You can explore Japanese Knife Company’s rust removing accessories if light surface rust appears.

Cleaning after raw meat or fish

After cutting raw meat, poultry, or fish, wash the knife promptly with warm water and washing-up liquid, then dry it immediately. Also clean the cutting board and work surface to prevent cross-contamination.

Do not leave raw meat or fish residue on the blade. This is important for both hygiene and blade care.

Storage after cleaning and drying

Once the knife is completely dry, store it in a way that protects the edge. A Japanese knife should not be left loose in a drawer where it can hit other cutlery or hard surfaces.

Good storage options include:

Always make sure the knife is fully dry before placing it into any cover, block, roll, or case.

Simple final answer

After every use, wash your Japanese knife by hand with warm or hot water and mild washing-up liquid. Keep the edge facing away from your cleaning hand, rinse the knife fully, and dry the blade and handle immediately with a clean towel. Never soak the knife, never put it in the dishwasher, and never store it while damp.

If your knife is Aogami, Shirogami, High Carbon, or another reactive carbon steel, dry it immediately and apply a very thin layer of suitable oil after use. Store the knife safely with a blade cover, saya, knife guard, magnetic rack, knife block, knife stand, or chef’s case.

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