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KATSU KNIVES

KATSU HABU 01, CPM S90V Convex Grind Blade, Titanium Alloy Handle with Carbon Fiber Inlay, Michael Emler Design

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PRODUCT DETAILS

About This Knife

KATSU KNIVES has long been celebrated by devoted fans for its exceptional quality. Many have asked for knives that align even more closely with Western usage habits. At this moment, American designer Michael brought us his vision — a straightforward, practical fixed-blade outdoor knife.

Unlike most designers, Michael studied Kendo and traditional Japanese blade-making in Japan, gaining deep insight into classic Japanese styles. Combined with extensive outdoor and combat experience, he holds exacting standards for practicality. This makes him the perfect partner to blend American utilitarianism with Japanese craftsmanship.

Built on mutual trust and understanding, our collaboration flourished. From that original fixed-blade concept, we created something new — this is the KATSU HABU folding knife. Crafted with premium materials and a robust blade design, it’s a reliable companion you can count on anytime, anywhere—delivering impressive durability and confidence even out in the wild.

The name "HABU" comes from a venomous snake native to the forests of southern Japan, where Michael lived for 13 years. He was adamant that this was the perfect name for this knife — just like the snake, it’s born for the wild, agile, and ready to adapt. No doubt — it was the perfect name!

One of this knife’s most impressive features is its outstanding ergonomics tailored to Western users. As an American knife designer—and a Western user himself—Michael carefully considered the typically larger hand sizes and usage preferences common in the West. The result is a knife that feels more substantial in hand, offering a secure, confidence-inspiring grip that’s well-suited to a variety of outdoor situations. At the same time, KATSU KNIVES’ signature Convex Grind blade style and obsessive attention to detail and quality are fully embodied and elevated in this creation.

Though the prototype was praised, we kept refining it over months, making many subtle, nearly invisible improvements. Now, the wait is over — and the final result exceeds all expectations.

When you hold this knife in your hand, we believe you will feel the sincerity, patience, and dedication poured into it. We are confident and proud of this knife.

 

About the Designer

Born and raised in the foothills of the Allegheny Mountains in eastern Ohio, Michael Emler learned the value of quality tools at a very young age. During a 18 year Navy career, he had the honor to learn multiple forms of self-defence, including Japanese swordsmanship while stationed in Japan. Part of his journey was learning the time honored tradition of Japanese wet stone sharpening.

His love of high quality edged tools eventually led him to starting his own sharpening business. He couldn’t help but get the knifemaking bug which lead to several successful knife designs.


Features
  • Satin Finish CPM-S90V Blade

Equipped with a premium CPM-S90V powder steel blade, known for exceptional wear resistance and long-lasting sharpness, ready to tackle harsh outdoor challenges. The blade surface features a satin finish, offering low reflectivity and corrosion resistance with a rugged tactical look. Classic drop point shape combined with a convex grind delivers strong tip durability while enhancing cutting efficiency and stability — a perfect balance of functionality and aesthetics for an outdoor blade.

  • Bead Blasted Titanium Alloy Handle with Carbon Fiber Inlays

The handle is made of titanium alloy with a bead blasted finish, providing a matte texture with excellent grip performance, reliable even when wet or gloved. Carbon fiber inlays on both sides are available in white and yellow options, enhancing friction and lending a modern, sleek aesthetic. 

  • Built for Comfort, Confidence, and Control

With its larger handle, thicker blade, the KATSU HABU is designed to offer a more comfortable grip and greater confidence—especially for Western users. Whether you’re slicing, piercing, or tackling tough tasks, it delivers smooth, controlled performance that helps you handle both wild adventures and daily work with ease.

  • Back Flipper + Bolster Lock

Just a flick of the finger — and you’re ready to roll. The back flipper delivers a smooth, fluid action that lives up to the standard KATSU KNIVES is widely praised for. Paired with a solid bolster lock, it gives you the kind of trust and control you need, anytime!

 

Specifications
Overall Length230 mm / 9 in
Closed Length127 mm / 5 in
Blade Length85 mm / 3.3 in
Blade thickness4 mm 
Blade MaterialCPM S90V 
Handle MaterialBead Blasted Titanium Alloy; 
Carbon Fiber Inlays;
Item weight161.5 g / 5.7 oz

 

CARE INSTRUCTIONS

Our knives are built to last. Cleaning and caring for your knife will maintain performance and enhance the life of your knife.

Tips for Caring Folding Knives
  • Keep your knife dry; that means the entire knife, not just the blade.
  • Keep your knife clean, particularly moving parts and locking devices.
  • Keep your knife oiled; especially pivot points and the blade. Oil at least twice a year.
  • Keep your knife sharp; a sharp blade is safer than a dull one.
  • Again, store your knife in a dry place.
Tips for Caring Kitchen Knives
  • Always use an appropriate cutting board in the kitchen to get the most out of the sharpness of your knives.
  • Cleaning knives after each use will keep them in the best condition and promote food safety.
  • Knives require a safe dry storage place, and a knife block is perfect for storing knives.
KATSU HABU 01, CPM S90V Convex Grind Blade, Titanium Alloy Handle with Carbon Fiber Inlay, Michael Emler Design

Customer Reviews

Based on 9 reviews
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Eric Clark
One Heavy-duty Work Horse

I absolutely love this knife. It is very well made and checks all the boxes. S 90V is a fantastic steel, and mine arrived hair shaving sharp. Perfect blade centering, and stout detent, allows the blade to rocket out. Just know this is a large knife, with a bit of heft to it. So, if you're looking for an edc that disappears in you pocket, look elsewhere. However, if you are looking for a large, well built, solid blade. You should consider this knife

R
Rush Shortley
Beautiful Knife!!

This is a beautiful knife. The convex grind on the blade makes it unique in my small collection and adds to its elegant shape. The shape of the handle fits well in my hand and makes the knife very usable for everyday tasks, and the large choil cut at the base of the blade allows for a very usable advanced grip along the blade for close, detailed work. The size, shape and placement of the pocket clip makes the knife easy to carry while not gouging into the hand during use. All-in-all, just a beautiful useful knife of perfect proportions.

D
DAVID BROWN
Beffy

I love this knife! It’s got great steel and good weight in my hand. It definitely has made the ranks of my favorite EDC

S
Scott Andrew
An excellent addition to my collection.

The arrival of this new knife was well worth it. Solid, excellent build and superb finish. The blade finish and balance has made it a favourite on my belt. The blade edge is extremely sharp and precise.

A
Anil Sahal
Cool Convex Grind

A very nice, largish folding knife. It feels good in the hand and the pocket, has enough heft to give a feeling of quality and the blade’s convex grind, without a secondary bevel to the edge; this is very unusual and special! I’m not very keen on the carbon fibre inlay in the handle as I think it looks a bit untidy and would’ve preferred it all to be milled titanium. The detent is quite stiff, so you’ll need strong fingers to flip it out with the tab but it does deploy with a satisfying, resonant clunk. I’d expect a full-length titanium back spacer on a knife of this price to add visual heft, but alas it’s only 1/4 length; no doubt a money saving design choice. The addition of leather sheath is, however, a nice touch.

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