# Can Japanese knives go in the dishwasher

Source: https://edgeandhaft.com/blog/can-japanese-knives-go-in-the-dishwasher
Published: 2026-10-09
Publisher: Edge & Haft

**Short answer:** No. Japanese knives, including Shun, Miyabi and Global, should be hand washed and dried, not put in the dishwasher. Makers advise hand washing because rattling dulls and chips the thin edge, harsh detergent and long wet cycles can cause spotting or rust, and heat and moisture damage wooden handles.

Dishwashers are convenient, and some knife boxes even use the phrase "dishwasher safe". For Japanese knives, though, makers consistently recommend hand washing. This page explains exactly what a dishwasher does to a thin, hard edge, to stainless and carbon steel, and to wood and resin handles. It also shows a quick hand washing routine and what to do if your knife has already been through a cycle. It applies to Japanese and premium German knives alike.

## What happens to a knife in the dishwasher

Japanese knives are especially vulnerable because their edges are thin and hard. A softer German edge tends to roll when it hits a plate, while a hard Japanese edge is more likely to chip. See [what HRC means](https://edgeandhaft.com/blog/what-is-hrc-rockwell-hardness) for why.

| Dishwasher factor | Effect on the knife |
| --- | --- |
| Spray jets and rattling | Edge knocks against racks, plates and other utensils, causing dulling and chips |
| Alkaline detergent | Can etch and spot steel, and dull handle finishes |
| Long wet cycle and steam | Rust spots on carbon steel and spotting on stainless near the edge |
| High heat and drying | Wood handles crack, swell or loosen; adhesives and fittings weaken |
| Sitting wet after the cycle | Moisture trapped around the handle and bolster encourages corrosion |

Dishwasher effects on a knife

## Are Shun knives dishwasher safe

No. Shun's care guidance says to hand wash Shun knives. Shun knives use hard stainless steels like VG-MAX and SG2 with thin edges, and many have PakkaWood or other wood-based handles that do not do well with dishwasher heat and moisture. Kai's warranty also excludes damage from improper maintenance, so dishwasher damage is unlikely to be covered. See [Shun free sharpening and repair](https://edgeandhaft.com/blog/shun-free-sharpening-and-repair) for what the service does fix.

The same applies to Miyabi, Global, MAC and most other Japanese brands, and to premium German knives from Wusthof and Zwilling, whose makers also recommend hand washing. Even when a box says a knife can survive a dishwasher, it will stay sharper and last longer if washed by hand.

## Stainless vs carbon steel in the dishwasher

Stainless Japanese steels like VG-10 and SG2 resist rust well with normal care, but "stainless" means stain-resistant, not stain-proof. A long, hot, wet cycle with salty or acidic food residue can leave spots or tiny pits near the edge.

Carbon steels like Shirogami and Aogami will rust in a dishwasher, sometimes badly in a single cycle. Never put a carbon steel knife in one. See [carbon vs stainless Japanese knives](https://edgeandhaft.com/blog/carbon-vs-stainless-japanese-knives) and [Japanese knife rust](https://edgeandhaft.com/blog/japanese-knife-rust).

Note: Wooden wa handles, including magnolia and ho wood, are not sealed for soaking. A dishwasher can swell, crack or loosen them.

## How to hand wash a Japanese knife

1. Wash the knife soon after use, especially after acidic or salty foods.
2. Use warm water, a drop of mild dish soap and a soft sponge. Avoid the abrasive green side and steel wool.
3. Hold the knife by the handle with the edge facing away from your hand, and wipe from spine to edge, never along the edge.
4. Rinse well, including where the blade meets the handle.
5. Dry immediately and completely with a towel, spine first, then both faces, then the handle.
6. Let it air for a few minutes before putting it in a block or saya, so no moisture is trapped.

Note: Never leave a knife in a sink of soapy water. It is a cut hazard and a common cause of chipped tips and rust.

## If your knife already went through the dishwasher

One accidental cycle rarely ruins a stainless knife, but repeated cycles add up. If a household member keeps loading knives into the dishwasher, a dedicated knife block or magnetic strip by the sink can help. See [how to store Japanese knives](https://edgeandhaft.com/blog/how-to-store-japanese-knives).

- **Dull or chipped edge:** sharpen on a whetstone. Small chips can be ground out; see [chipped Japanese knife](https://edgeandhaft.com/blog/chipped-japanese-knife).
- **Rust spots:** remove light rust with a rust eraser or a paste of baking soda and water, then dry and oil. See [Japanese knife rust](https://edgeandhaft.com/blog/japanese-knife-rust).
- **Dry or rough wooden handle:** let it dry fully, then rub in food-safe mineral oil. See [Japanese knife oil](https://edgeandhaft.com/blog/japanese-knife-oil).
- **Loose or cracked handle:** stop using the knife until it is repaired. See [loose or cracked knife handle](https://edgeandhaft.com/blog/loose-or-cracked-knife-handle).

## If you really want dishwasher-friendly knives

Some all-stainless knives with molded or metal handles, such as Global's one-piece steel design, handle water better than wood handles. Global still recommends hand washing to protect the edge. If low-fuss care is a priority, choose a stainless steel blade, a synthetic handle, and wash by hand anyway. Our [best Japanese knives for beginners](https://edgeandhaft.com/best/best-japanese-knives-for-beginners) and [best Global knives](https://edgeandhaft.com/best/best-global-knives) guides favor easy-care picks.

[See easy-care Japanese knives](https://edgeandhaft.com/best/best-japanese-knives-for-beginners)

## Frequently asked questions

**Are Shun knives dishwasher safe?** No. Shun recommends hand washing. Dishwasher damage is generally treated as improper care, not a defect.

**Can you put knives in the dishwasher at all?** Cheap stamped knives survive, but any knife stays sharper and lasts longer if washed by hand.

**What happens if I put a carbon steel knife in the dishwasher?** It will likely rust. Remove the rust, dry it and oil the blade, then hand wash from now on.

**Can I put a knife block in the dishwasher?** No. Wooden blocks warp and crack. Clean slots with a pipe brush and let them dry fully.

## Gear guides for this topic

- https://edgeandhaft.com/best/best-japanese-knives-for-beginners
- https://edgeandhaft.com/best/best-shun-knives
- https://edgeandhaft.com/best/best-global-knives