Hatsukokoro | SKU: HS-KUKS-B2KU-BK180

Hatsukokoro Kumokage Blue 2 Kurouchi Damascus Bunka 180mm

Name: Hatsukokoro Kumokage Blue 2 Kurouchi Damascus Bunka 180mm
Brand: Hatsukokoro
SKU: HS-KUKS-B2KU-BK180
Price: 5091.00 TWD
Availability: InStock

$5,091.00

IMPORTANT: Carbon steel knives can rust or patina quickly if not cared for properly. They require regular cleaning, drying, and oiling. If you are unfamiliar with carbon steel maintenance, we recommend choosing a stainless steel option instead.

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St Peters, NSW —
2 Bishop St, Unit 2, St Peters NSW 2044
+61 2 8234 8818
Crows Nest, NSW —
107 West St, Shop 1, Crows Nest NSW 2065
+61 2 8234 8848
Pickup only
Prahran, VIC —
180 Commercial Road, Shop 1, Prahran VIC 3181
+61 3 8199 9948
Pickup only

Detailed Specifications

Line	Hatsukokoro by Muneishi Kumokage Damascus
Profile	Bunka
Bevel Type	Double Bevel
Weight	157 g \| 5.5 oz
Edge Length	177 mm \| 6 31/32″
Heel Height	45 mm \| 1 49/64″
Width @ Heel	3.2 mm \| 1/8″
Width @ Mid	2.4 mm \| 3/32″
Width @ 1cm from Tip	1.0 mm \| 3/64″
Steel	Blue 2 / Aogami #2 \| Carbon
Blade Construction	Sanmai - Soft Iron Damascus Clad
Hardness (HRC)	61 - 63
Surface Finish	Kurouchi
Handle	Octagonal Black Chacate
Region	Hyogo
Best for	Enthusiasts Collectors

Free shipping for knives over AU$200 Australia wide.
World-wide shipping via DHL Express, 3 to 5 days.

We all LOVE Shigeki Tanaka’s knife, light, nimble, not a laser but glides through potatoes effortlessly, with minimal stiction. Problem is, we can never get enough of them. One of the most difficult products to get is the Kurouchi line, the lead time was significant. So a few years ago, I started searching for the perfect replacement: cuts well, rustic looking, and most importantly, same unbeatable price.

Fast forward to 2022, we finally received something from our close partner Hatsukokoro, and man, I am stoked: this blue 2 KU damascus line Kumokage(雲影, Cloud Shadow)exceeded almost every aspect of expectation.

The finish is something worth talking about, it is Kurouchi, but unlike a typical one, this one have a slightly scratched and beaten look, with a blue/teal lurking underneath the black. Under the finish is the damascus cladding, rolling gently across the bevel, sinking into the edge made by etched Blue 2 core steel. This combination creates an artistic look that I think quite fitting to the name of Cloud Shadow, at the same time, the etching provides the core steel a certain level of resistance to rust. Oh, let's not forget about that lovely stamped Hatsukokoro mark, which you don't see on other lines offered by Hatsukokoro.

This Hatsukokoro blue 2 line is made by the Muneishi Cutlery, which has a long history back in 1955. They heat treat their blue 2 steel to about 62 to 63 HRC which I consider is optimal hardness for blue 2. Can't fault the grind as well, very soild cutting performacne which makes this Hatsukokoro Blue 2 line a perfect knife for anyone looking to get into the world of carbon knife or for experienced users that just loves the cutting feel of carbon steel.

Pros	Cons
Budget friendly Great artistic Highly collectable	Prone to rust Etched damascus can be hard to maintain

Care Instruction

Don't cut hard things! Japanese knives are brittle so bone hacking is a NO NO!
Wash with neutral detergent after use, and wipe dry;
Please don't wash knife with dishwasher, it will damage the wood handle;
Be careful not to leave the knife close to a heat source for a long time;
It is a lot more dangerous to cut with a blunt knife than a sharp knife!
It is best to sharpen a Japanese knife regularly on a waterstone.
Oil the (carbon) knife if storing for an extended period of time to prevent rust.

Hatsukokoro

Rising star of the industry

Hatsukokoro as a brand works extensively with the Japanese kitchen knife industry. Through collaboration with makers and manufacturers across the Japan, they’ve designed and created a huge collection of different knives, covering every possible price range while having a great value in many of their product lines. Their capabilities to incorporate resources have built a strong relation with knife makers, and more and more are happy to send their knives down to Amagasaki and have them delivered across the world.

“The rapidly expanding new brand in the industry based in Amagasaki, offering great varieties by working close with different makers across entire Japan to the entire globe while innovating in product design and metal fabrication.”

Est. 2019 | 令和元年

Known for Unrivalled product availability, exceptional performance at a highly competitive price.

Website handk.co Instagram @handk_official Read more about Hatsukokoro

Knife details

Profile

Bunka

A pointier version of the Santoku. The Bunka knife features a distinctive profile with a straighter edge and a pointed tip, making it versatile for a variety of kitchen tasks. Its design is a blend of the Santoku and K-tip Gyuto knives, with a blade length typically around 165mm to 180mm. The Bunka is particularly adept at slicing, dicing, and chopping fruits, vegetables, and meats, thanks to the precision and control enabled by its length and flat edge profile. The angled tip, also known as a reverse tanto, provides additional precision for intricate tasks such as julienning. With its unique shape and functionality, the Bunka stands out as a multifunctional knife in the culinary world.

Compare with

Blue 2 / Aogami #2

—

1.25% 0.9% 0.6% 0.3% 0

C — Carbon Cr — Chromium W — Tungsten Mn — Manganese Si — Silicon P — Phosphorus S — Sulfur

Manufacturer
- Hitachi Special Steel, Japan
Nature Carbon
Hardness61–63 HRC

Blue Steel No.2, also recognized as Aogami No.2, is a distinguished high carbon steel produced by Hitachi Metals Ltd, enhanced by the addition of chromium and tungsten to the base of White Steel No.2. This modification brings about an improvement in toughness and the creation of hard carbide molecules, which significantly boost edge retention. Although its sharpness is comparable to that of White Steel No.2, Blue Steel No.2 offers a slight advantage in maintaining its edge.

Widely favored for its versatility, Aogami No.2 is celebrated for its ease of sharpening and robust resistance to chipping, making it an ideal choice for those new to Aogami steel knives. Containing 1.0–1.2% carbon and achieving a typical hardness of 62–63 HRC on the Rockwell scale, it stands as the benchmark in evaluating Aogami steel cutlery.

Construction

Sanmai - Soft Iron Damascus Clad

Sanmai (Three-Piece) is a common construction for double bevel knives where two pieces of softer cladding steel are forgewelded to each side of a harder core steel. The harder but more brittle core steel will form the hard cutting edge after heat treating, and the softer cladding will support the core to increase the overall strength of the blade.

Damascus Sanmai utilize damascus steel as the cladding material for the Sanmai construction, which adds aesthetic feature to the blade. However, the damascus cladding found on Japanese kitchen knives with carbon steel core are ususally made of soft iron, which means they too need to be maintained to stay pretty.

The soft cladding enables the thinning process to be a lot easier than a honyaki or monosteel construction. However, when the cladding is made of damascus, whether etched, polished or mirror polished, the thinning process will take a toll on the cladding, meaning the damascus won't look the same as when it was taken out of the box.

Finish

Kurouchi

Kurouchi refers to the rustic, unpolished finish found on the blade of many traditional Japanese kitchen knives. This blacksmith's finish is characterized by its dark, textured appearance, which is the result of leaving the blade forge-scale on the steel during production. Kurouchi finish not only adds a unique aesthetic appeal but also provides certain practical benefits. It acts as a protective layer against rust and corrosion, and helps to reduce food sticking to the blade during cutting. Commonly seen on high-quality, hand-forged knives, the kurouchi finish emphasizes the artisanal nature of the knife and its heritage, making each piece distinctively unique.

Handle

Octagonal Black Chacate

Profile Octagonal WA
Material
- Black Chacate

Black Chacate is a highly valued timber known for its deep, rich brown to almost black coloration, fine texture, and exceptional durability. It polishes well, offering an exquisite finish that highlights its subtle, elegant grain patterns. This wood is often used in fine woodworking projects, including luxury furniture, decorative items, and high-end knife handles.

An octagonal wa handle made from Black Chacate wood would exhibit a sleek, geometric shape that fits comfortably in the hand, enhancing the user's grip and control. The deep hues and natural luster of Black Chacate add a touch of sophistication and unparalleled beauty to the handle, making it not only a functional component of a kitchen knife but also a piece of art. The durability and stability of Black Chacate ensure that the handle withstands the rigors of kitchen use while maintaining its aesthetic appeal over time.

Frequently asked questions

Will a carbon steel knife rust, and how do I look after it?

Yes - carbon steels such as Aogami (Blue) and Shirogami (White) react with food, moisture, and acids. Left wet they can spot or rust, and with normal use they develop a grey-blue patina. That patina is expected and is part of owning a carbon-steel knife; it is not damage.

Care is simple once it becomes habit: hand-wash in warm water, never leave the knife soaking or sitting in a wet sink, and dry it thoroughly the moment you finish. Avoid the dishwasher entirely, and wipe the blade between tasks when you are cutting acidic foods like citrus, tomato, or onion.

If the knife will sit unused for a while, wipe a very thin film of food-safe camellia oil (or a neutral mineral oil) onto the blade before storing it. A light surface rust spot lifts easily with a rust eraser or a little Bar Keepers Friend; sustained neglect is the only thing to really avoid.

Carbon steel rewards this small amount of attention with a keener edge and easier sharpening than most stainless. If you would rather not think about maintenance at all, ask us about stainless or stainless-clad options instead.

Blue 2 vs White 2 steel for Japanese kitchen knives

Blue 2 (Aogami #2) and White 2 (Shirogami #2) are both Hitachi high-carbon steels, but Blue 2 adds chromium and tungsten to White 2’s base, giving it noticeably better edge retention while keeping similar sharpness. The trade-off is that Blue 2 is slightly more abrasion-resistant during sharpening, so it takes a little more time to refine an edge, whereas White 2 is easier to sharpen and can take a finer, more aggressive edge but dulls faster in use.

Reviewed by K&S Staff · Last updated 22 July 2026

Hatsukokoro Kumokage Blue 2 Kurouchi Damascus Bunka 180mm

Availability

Detailed Specifications

Hatsukokoro

Knife details

Bunka

Blue 2 / Aogami #2 Element Composition

Blue 2 / Aogami #2

Sanmai - Soft Iron Damascus Clad

Kurouchi

Octagonal Black Chacate

Frequently asked questions

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Hatsukokoro Kumokage Blue 2 Kurouchi Damascus Bunka 180mm

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