Misen 8-inch chef knife with stainless steel blade and black handle

6" Bunka Knife (ACUTO440) - Black

Black
$99.00
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Misen 8-inch chef knife with stainless steel blade and black handle
  • Misen 8-inch chef knife with stainless steel blade and black handle
  • Misen chef's knife slicing a fresh tomato on a wooden cutting board
  • 6" Bunka Knife (ACUTO440) - Black
  • Misen chef knife with black handle and stainless steel blade
  • Misen chef's knife blade close-up showing polished stainless steel and bolster
  • Misen chef's knife with blue handle on wooden cutting board with fresh parsley
  • Misen 8-inch chef knife with stainless steel blade and black handle
  • Misen chef's knife slicing a fresh tomato on a wooden cutting board
  • 6" Bunka Knife (ACUTO440) - Black
  • Misen chef knife with black handle and stainless steel blade
  • Misen chef's knife blade close-up showing polished stainless steel and bolster
  • Misen chef's knife with blue handle on wooden cutting board with fresh parsley
6" Bunka Knife (ACUTO440) - Black

28 Reviews

6" Bunka Knife (ACUTO440) - Black

$99.00

A Japanese-style chef’s knife with a paring tip. Compact, versatile, and built for everyday prep with extra precision.

Color: Black
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60-Day Test Drive
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Lifetime Warranty Against Defects
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Free Returns
Features
  • AICHI ACUTO440 Japanese steel for exceptional sharpness and edge retention
  • Lab-tested rust resistance proven to withstand 50 days submerged in water and up to 100 dishwasher cycles.
  • 6” straight-belly blade for compact, versatile prep and clean, controlled cuts
  • Triangle tip for precise tasks like mincing and trimming
  • Ergonomic rounded spine and bolster for a more comfortable pinch grip
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Rust-Proof
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ACUTO440 Steel
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Up & Down Chop
Use & Care
  • Hand wash
  • Dry immediately after use
  • Sharpen every 4–6 months
  • Heads up: High-carbon knives may show discoloration after exposure to acidic foods and/or salt. This is purely cosmetic and different from rust, which is extremely rare. 
  • Visit our Help Hub for more on how to use and care for this knife.

Let Us Handle the Sharpening
Specifications

Blade Length: 5.9 in. / 152 mm
Total Length: 11.52 in. / 293 mm
Handle Thickness: 18 mm
Weight: 0.43 lb / 194 g
Steel: AICHI ACUTO 440 (Japan)
HRC: 58±2
Grind & Edge: 50/50 Symmetrical, 14° per side
Handle Material: Polyoxymethylene
Country of Production: PRC
Warranty

All Misen products come with a lifetime warranty against defects. Misen will replace any defective products. Learn more about our warranty policy here and what's covered.

Pair it with

Basically a Navy Seal

Rust-proof after 100 dishwasher cycles.

Because it’s got more chromium than standard high-carbon stainless, ACUTO440's rust resistance is a lab result, not a marketing claim.
Sliced salami and mozzarella sheet pan pizza on parchment paper being cut with a Misen chef's knife
Misen bread knife slicing dark sourdough loaf on wooden cutting board

Works Harder, Stays Sharper

Holds a razor edge through heavy prep.

At 58±2 HRC, ACUTO440 has incredible edge retention without brittleness. That means you can put off sharpening it for longer.

Questions?

What are Misen’s ACUTO440 Knives made of?

Our ACUTO440 Knives are made with AICHI ACUTO440, an exceptionally corrosion-resistant Japanese high-carbon stainless steel. AICHI ACUTO440 is rust-proof, incredibly durable, and has excellent edge retention. What that means for you: less time cleaning and sharpening, more cooking.
What’s the difference between Misen’s ACUTO440 Knives and classic knives?

All of our knives are made from high-carbon stainless steel, which is what gives them their razor-sharpness and excellent edge retention. However, our ACUTO440 Knives have a much higher chromium content (about 18%), which makes them significantly more corrosion (aka rust) resistant.

Our ACUTO440 Knives also feature a rounded spine and heel (the back of the knife where the blade meets the bolster), creating a more comfortable grip over long prep sessions.
How are Misen’s ACUTO440 Knives different from other high-carbon knives?

We wanted our ACUTO440 Knives to be high-performance tools that you could still leave in the sink overnight if you needed to. That’s why our ACUTO440 Knives are made with AICHI ACUTO440, a Japanese high-carbon stainless steel that is more durable and easier to care for than other high-carbon knives, which are prone to rusting and/or chipping without proper care.
What do you mean by rust-proof?

Our ACUTO440 Knives are made with AICHI ACUTO440 steel, an exceptionally corrosion-resistant Japanese high-carbon stainless steel. Our knives have been lab-certified to withstand up to 100 dishwasher cycles, as well as 50 days of being submerged in water, without showing any signs of rust.
Can I put Misen’s ACUTO440 Knives in the dishwasher?

While our ACUTO440 Knives have been lab-certified to withstand up to 100 dishwasher cycles without showing any signs of rust, we generally recommend hand washing all of your Misen knives. Because our knives are extremely sharp, when they get jostled around in the dishwasher, the blade can cut through the soft materials that make up your dishwasher racks. Dishwashing can also damage your knives if the blade edge bangs against hard objects like flatware or pots and pans during the washing cycle.
How often should I sharpen my knives?

Whenever you start to notice your knife is slicing and dicing a little less crisply than usual, it’s time to sharpen. Although our ACUTO440 Knives can go long periods between sharpenings, we generally recommend getting them sharpened about twice a year for best performance. We also recommend regularly using a honing rod between sharpenings to keep your knife edge in good shape.
My blade has discoloration and/or staining. What is this?

While our ACUTO440 Knives are rust-proof, all high-carbon knives can experience some discoloration and/or staining with prolonged exposure to acidic foods and/or salt. This is purely cosmetic and is not the same as rust.

Customer Reviews

5.0
Rated 5.0 out of 5 stars
Based on 28 reviews
Total 5 star reviews: 28 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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28 reviews
  • AB
    Flag of United States
    Verified Buyer
    Reviewing
    6 inch Bunka Knife - ACUTO440 - New
    I recommend this product
    Product Standouts sharp, easy-to-use, good balance, sleek design, comfortable handle
    Rated 5 out of 5 stars
    1 month ago
    My new favorite knife.

    My go to knife has been the Misen 8 inch chef knife since it was released. This knife is my new favorite. Super sharp out of the box and seems to hold an edge longer than my other knives, including the 8 inch Chef. The blade shape is fantastic. My one complaint is, I want it in an 8 inch version...

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  • Richard K.
    Flag of United States
    Verified Buyer
    Reviewing
    6 inch Bunka Knife - ACUTO440 - New
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    Bunka Knife

    Very nice knife, extremely sharp!

    Was this helpful?
  • Jonathan S.
    Flag of United States
    Verified Buyer
    Reviewing
    6 inch Bunka Knife - ACUTO440 - New
    I recommend this product
    Product Standouts sharp, easy-to-use, good balance, nice weight, comfortable handle
    Rated 5 out of 5 stars
    2 months ago
    Great knife!

    Real nice weight and balance--sharp, too. The 6-inch blade makes it easier to use than an 8-inch Chef's knife.

    Was this helpful?
  • Atiba D.
    Flag of United States
    Verified Buyer
    Reviewing
    6 inch Bunka Knife - ACUTO440 - New
    I recommend this product
    Product Standouts sharp, good balance, premium materials, nice weight
    Rated 5 out of 5 stars
    2 months ago
    Great

    Like all Misen this is an excellent knife. Very pleased

    Was this helpful?
  • Alisa H.
    Flag of United States
    Verified Buyer
    Reviewing
    6 inch Bunka Knife - ACUTO440 - New
    I recommend this product
    Product Standouts sharp, good balance, comfortable handle, sleek design, nice weight
    Rated 5 out of 5 stars
    3 months ago
    Surprisingly thin!

    This knife may replace my chef’s knife for most tasks!

    Was this helpful?
Show More
Why the 6" Bunka Knife Is Ideal for Precise Everyday Prep

The 6" Bunka Knife is a Japanese-style blade built around the kind of detail work that a standard chef's knife can't always handle cleanly. Its defining feature is the pointed, triangular tip—borrowed from traditional Japanese knife design—which makes it exceptionally capable at scoring, trimming, and intricate cuts where control matters most. At 6 inches, it's compact enough to maneuver quickly but still handles most everyday prep without feeling limiting.

Made from ACUTO440 steel, the blade holds a sharp edge well and responds easily to honing. The ergonomic handle keeps your grip comfortable during longer prep sessions. If you're building out a Japanese-influenced knife kit, it pairs naturally with the 5.5" Utility Knife in ACUTO440 for smaller tasks, or the 6.5" Gyuto Knife when you want a bit more blade length for proteins and larger vegetables. For a complete setup, the 7-Piece ACUTO440 Knife Set brings everything together in one cohesive collection.