Joybuy Insights

Buying a Santoku knife: how to choose the right blade length, material and model

A Santoku knife combines a broad, relatively short blade with a straight or gently curved cutting edge. It’s particularly suited to slicing, dicing and chopping vegetables, herbs, fish and boneless meat. For home cooks and fans of Asian cuisine, a Santoku knife can be a useful addition to the classic chef’s knife.

However, some product claims can lead to unrealistic expectations. A striking blade design, a “dishwasher-safe” label or claims of exceptionally hard steel don’t, on their own, tell you whether a knife will suit your everyday cooking.

Common misconceptions when buying a Santoku knife

1. Granton edges are mistaken for effortless cutting

A Santoku knife with a Granton edge has small indentations along the blade. These can reduce contact between the food and the steel, helping ingredients such as potato slices and soft vegetables to stick less. However, the edge doesn’t replace regular care, nor does it make a knife suitable for every task.

Santoku knives are generally not designed for cutting bones, frozen food, hard skins or very firm ingredients. These tasks can damage the blade.

2. “Dishwasher-safe” doesn’t mean it’s best to wash it in the dishwasher

According to the product information, a dishwasher-safe Santoku knife can go in the dishwasher. However, heat, detergent and contact with other cutlery can put stress on the blade. Several models therefore come with a recommendation to hand-wash them, even when the technical specifications say they’re dishwasher-safe.

To keep the knife sharp for as long as possible, wash it with mild washing-up liquid, dry it straight away and don’t leave it loose in the cutlery drawer.

3. A Damascus finish alone doesn’t prove quality

A Damascus Santoku knife can stand out thanks to its patterned blade. But there are other details to consider when choosing a knife: the actual blade material, edge geometry, handle construction, blade length and care instructions. The word “Damascus” alone tells you neither how practical the knife is for everyday use nor how long it will last.

What to check before you buy

Blade length: a 17 cm or 18 cm Santoku knife?

The most common sizes are 17 cm and 18 cm:

  • A 17 cm Santoku knife is usually well suited to small and medium-sized chopping boards and compact kitchens. It’s relatively easy to handle and works well for vegetables, herbs and smaller ingredients.
  • An 18 cm Santoku knife offers a little more cutting surface, which can be useful when preparing larger portions. It takes up more space on the chopping board and, depending on its design, may feel slightly heavier.

Blade length isn’t the only thing that matters: weight is important too. For example, a Victorinox model with a 17 cm blade is listed at 103 g, while the ZWILLING Gourmet Santoku, at 18 cm, has a net weight of 163 g. These details can help you judge how comfortable a knife will be to handle.

Blade material and construction

A rust-resistant Santoku knife is often made from stainless steel or specially treated steel. Look for specific information about the type of blade and how it’s made:

  • Stainless steel is easy to care for and corrosion-resistant in everyday kitchen use, but it still needs to be cleaned and dried.
  • FRIODUR ice-hardened steel is used in various ZWILLING models. The product information for the models mentioned includes details such as corrosion resistance and the specific way the material is processed.
  • A forged blade and full tang can contribute to stability and balance. The 5five Forged Stainless Steel Santoku Knife is described as having a forged design and full-tang construction.
  • A plastic handle is generally resistant to moisture. Wooden or bamboo handles need more care and shouldn’t be left to soak.

Cutting, handle and storage

A broad blade supports controlled cutting and gives your fingers more room. The handle should be dry, easy to grip and a comfortable size for your hand. A finger guard can provide extra protection, but it’s no substitute for proper cutting technique.

Use a wooden or plastic chopping board. Stone, glass and ceramic surfaces can blunt the blade more quickly. A knife block, magnetic strip, drawer insert or blade guard are all suitable storage options.

Our picks for different users

Ideal for: budget-conscious beginners
Victorinox Swiss Classic Santoku knife, 17 cm

Victorinox Swiss Classic Santoku knife, 17 cm

Why this product suits this user: The 17 cm blade, plastic handle and stated weight of 103 g make it a good fit for everyday cutting tasks and smaller kitchens.

How this product avoids the pitfall

The product details clearly specify the blade length, stainless steel, Granton edge and dishwasher-safe rating, rather than relying on a vague description of its design.

Key benefits and strengths

17 cm blade, stainless steel and plastic handle; the blade is listed as rust-resistant and dishwasher-safe.

Ideal for: buyers with high expectations of quality
ZWILLING Gourmet Santoku knife, 18 cm

ZWILLING Gourmet Santoku knife, 18 cm

Why this product suits this user: This model combines an 18 cm blade made from FRIODUR ice-hardened special-melt steel with an ergonomic plastic handle. It’s made in Germany.

How this product avoids the pitfall

The material and care information is clearly stated. Although the knife is classed as dishwasher-safe, hand-washing is recommended to protect the blade.

Key benefits and strengths

18 cm blade, FRIODUR processing, V-edge and plastic handle with a seamless transition.

Ideal for: specific tasks and frequent use
ZWILLING Twin Cuisine Santoku knife with Granton edge

ZWILLING Twin Cuisine Santoku knife, 18 cm, with Granton edge

Why this product suits this user: The Granton edge may appeal to anyone who regularly slices vegetables, fish and meat and wants ingredients to stick less to the blade.

How this product avoids the pitfall

The Granton edge is listed as a specific feature. At the same time, the product description notes that hand-washing is the preferred care method, despite the knife being dishwasher-safe.

Key benefits and strengths

18 cm stainless steel blade, ice-hardened finish, full-tang construction and stated rust resistance.

Looking for more options?

We’ve put together a complete, regularly updated list of products that meet these strict selection criteria and fully comply with the safety regulations in force in the EU.

Santoku knife or Santoku knife set?

A single knife is enough if you already have a chef’s knife and a small paring knife. A Santoku knife set or kitchen knife set may be a better choice if you want to cover a range of cutting tasks. The ZWILLING Pro Series set includes an 18 cm Santoku knife, a Chinese chef’s knife, a paring knife and a cleaver, as well as a bamboo block. The block has four knife slots and an extra slot for scissors; according to the product information, scissors aren’t included.

A two-piece set with a Santoku knife and paring knife may be enough for smaller households. Before buying, check whether you’ll actually use each knife regularly. A larger set isn’t automatically better value if some of the pieces go unused.

Santoku knife FAQs

How long does a Santoku knife last?

Its lifespan depends on the steel, edge geometry, how often you use it and how well you care for it. Don’t use a knife on glass, stone or ceramic surfaces. Regular honing and professional sharpening can help keep it in good working order. Visible chips or a loose handle are signs that you should stop using it.

Is a Santoku knife suitable for meat?

Yes, Santoku knives are generally suitable for boneless meat, fish, vegetables and herbs. Avoid bones, frozen food and hard objects, as these can damage the blade. A longer chef’s knife may be more practical for very large cuts.

How much does a good Santoku knife cost?

The price depends on factors such as the blade material, manufacturing process, handle, Granton edge and what’s included. Don’t compare prices alone: check the exact blade length, care requirements, dishwasher-safe rating and the items included in a set.