

ZDP-189 Bunka Silver 190mm (7.5") - BLADE
✔︎ No import fees & duties - worldwide |
- Description
- Specifications
- Knife Care
- Shipping
The ZDP-189 Bunka Silver blade is available without a handle. This is your chance to make your own handle or order it separately so you can put together a one-of-a-kind knife that is perfectly suited to your taste and needs. The knife is also available with an octagonal handle in walnut wood.
ZDP-189 Bunka was designed in harmony with our values (excellence, quality, and reliability), in line with those originating from the steadfast Japanese tradition. We also devoted special attention to certain aesthetics inspired by Japanese mysticism and a respectful attitude to tradition, nature, raw materials, the constituent elements, and the final product – in short, the quintessential values of Japanese culture.
The knife is manufactured at the smithy of Yoshida Hamono in Japan, a family company with an age-long tradition in manufacturing state-of-the-art tools and Japanese swords, i.e. katanas, by hand. Yoshida Hamono has a great deal of experience forging ZDP-189 steel in the traditional manner. See the photo story from our visit to their smithy.
BLADE SHAPE:
The shape of the blade is called Bunka which means culture in Japanese. Bunka makes for a highly versatile knife suitable for cutting vegetables, meat, and fish.
With its typical functionality, Bunka design is intended for versatile use in Western cuisine:
- It has a flexible profile that is wide enough at the handle,
- a gently designed belly of the blade suitable for making either long or short cuts,
- a flat back side of the blade,
- and a thin pointy reverse tanto tip for precise cuts and carvings.
The angle of the spine rapidly changes to meet the tip, which is referred to as a »K-Tip«. Besides looking badass, this shape allows the user precision and makes getting to the hard-to-get-places a bit easier.
STEEL:
The heart of the knife is made of ZDP-189 steel, which we selected because systematic testing has proven its superior qualities and long-lasting sharpness.
The steel contains as much as 3% Carbon (C), which is one of the main elements contributing strength and typically found in amounts of up to only 1% in other types of solid steel, while the Chromium (Cr) content, which prevents corrosion, amounts to nearly 20%. It also features 0.60% Tungsten (W), which considerably increases the abrasion resistance of steel, 1.4% Molybdenum (Mo), which helps to preserve the strength and power of steel under variable temperatures, and 0.10% Vanadium (V), the key element in increasing steel strength. Heat treatment produces steel with a hardness of 65-67 HRC.
ZDP-189 composition: C 3.00 % | Cr 20.00 % | W 0.60 % | Mo 1.40 % | V 0.10 % | Mn 0.50 % | Si 0.40 %
LAMINATION:
The steel is laminated, meaning that the core is made of very strong steel covered with an external layer of softer stainless steel - also known as warikomi clad. The softer external layer protects the core steel from external factors.
The hard core of a knife is sandwiched between two layers of softer steel, reaching only up to a half of the blade’s width. This specific type of construction is used for steels that are very challenging to forge, for example for certain types of powder steels. A glowing hot piece of iron is split and a piece of steel is inserted. The material is now forged into one piece. This creates a highly durable kitchen knife with a slightly more pliable core. The main advantage of these knives is that they are thin, sharp and retain their edge very well. Warikomi is also called the “split and insert method”.
GEOMETRY:
Bunka has a double bevel (symmetrical) blade with a low profile and a V-edge grind, which gives it a good balance between the ease of cutting and robustness. This kind of grind produces very sharp edges and is wonderful at making very thin slices.
BLADE FINISH:
The blade is finished with a mirror polish hairline finish, which is suitable for the finest cuts. The single hairline, running along the length of the blade (just above the edge of the blade), marks the separation between the softer and the harder, core ZDP-189 steel.
The knife bears barely visible impressions of the hand-forging process (round hammer dents on the blade), which gives it a beautiful rustic finish and also prevents food from sticking to the blade. Kanji 登録 九佐吉作 "registered as work of Yoshida Smithy in Saga Prefecture, Kyushu, Japan" has been chiseled onto the blade.
BLACKSMITH:
The knife is manufactured at the smithy of Yoshida Hamono in Japan, a family company with an age-long tradition in manufacturing state-of-the-art tools and Japanese swords (katanas) by hand. Yoshida Hamono has a great deal of experience forging ZDP-189 steel in the traditional manner. See the photo story from our visit to their smithy.
The knife is laminated, forged, and heat treated by the blacksmith in his small smithy in the south of Japan. The kuro-uchi finish has a touch of rusticity and robustness that comes with the purely handmade blade. Handles are in different shades of brown, from dark brown to light brown. Therefore, each piece is completely unique. |
Blade shape: Bunka
Steel type: ZDP-189
Blade construction: Warikomi / convex v-edge / migaki
Hardness (HRC scale): 65-67
Overall length: 290mm (11.4")
Blade length: 190mm (7.5")
Blade height: 52mm (2.0")
Spine thickness: 2mm (0.08")
Weight: 155g (5.5")
Tang length: /
Recommended handle size: M
Kanji on the blade:
Blacksmith: Yoshida Hamono
Location of the smithy: SAGA / Saga Prefektura / Japan
☝️ Japanese kitchen knives in our store are handmade from natural materials. Slight variations in color, texture, weight and other dimensions are possible. We try to give a good photographic representation of our products, however computer screen resolution and colors do vary, so products might not look exactly as they are seen on screen.

Blade wear depends on the quality of steel, usage and maintenance of the blade. Japanese knives are made of high-quality steels. Follow these tips to keep your Japanese knife in top-notch shape:
✔ Use a wooden, plastic or rubber cutting board.
✔ After use, wash the knives and wipe them dry.
✔ For storage, use a knife holder or a protective knife sheath (saya).
✔ A good cutting technique is your best bet to prolong sharpness.
✔ Use sharpening stones to sharpen the knife.
❗️Don’t leave the knife in the sink. Wash it by hand.
❗️Don’t wash the knife in the dishwasher.
❗️Don’t use the knife on glass, ceramics, marble or steel surfaces.
❗️Don’t scrape the food off the cutting board with the edge of the blade. Use the spine of the knife instead.
❗️Knife is a tool intended for specific use - cutting food. It is not a can opener, screwdriver, trowel, wire cutter, hammer etc.
→ For more details, read our guide
on Maintenance of Kitchen Knives.
🤙 Contact us if you need some help. We reply within 1 business day.
SHIPPING RATES:
- €10 - flat worldwide rate with DHL Express (express delivery, 2-5 business days).
- FREE - all orders over €300 (DHL Express).
EXCEPTIONS:
- United Kingdom - shipping to UK costs €15. All orders are shipped with UPS Express (2-3 business days). Free shipping on orders over €300.
- Russia (currently not available) - shipping to Russia costs €40. All orders are shipped with EMS postal service.
DUTIES AND IMPORT TAXES:
We ship all orders DDP (duties & taxes paid). This means you will not be charged for any import fees and taxes (including VAT). All our prices are final. The price you see at checkout is the final price, no hidden costs.
DELIVERY TIME:
- Europe: 1-2 business days
- US & Canada: 2-4 business days
- Rest of the World: 3-5 business days
RETURNS:
Our return policy lasts 30 days. If more than 30 days have gone by since the day you received your order, unfortunately we can’t offer you a refund or exchange.
→ Read our SHIPPING & RETURNS policy for more info. We strive to solve any issues fast and with as little hassle for you. If you have some additional questions, please contact us.
Each knife comes with:
✔️ Instructions and knife care leaflet.
✔️ A preventive Band-Aid – the knives are very sharp! 😉
✔️ Original box from the blacksmith, which we wrap in an old Japanese newspaper sheet – so every knife is ready to be passed on as a gift as soon as it hits your doorstep!
✔️ We also offer a special gift wrapping option with the traditional Japanese washi paper.
Have you ever tried to match the individual handles and blades on our website to make your own custom knife?
Knife configurator
Now that’s a lot of options! It can be hard to visualize the end result and see whether the chosen handle and blade are a good match.
That’s why we’ve just launched the SharpEdge Configurator - a digital mix-and-match tool that you can use to assemble your very own custom knife!
Knife handles
Handle Fitting service
Add Handle Fitting service to your cart when you order a blade (knife without a handle) and a custom handle from us and want us to install the handle on the blade for you.
Quiz
Still doubting which type of Japanese knife should best fit your needs?
We created a 5-steps quiz to help you find the perfect knife based on your cooking skills and the type of food you prepare.