KIREAJI
ZDP189 Gyuto (Kiritsuke) 270mm -Mirror Polished(both sides)
ZDP189 Gyuto (Kiritsuke) 270mm -Mirror Polished(both sides)
Shipping is free to the United States and Canada.
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<Type>
Gyuto (Kiritsuke)
-Double-edged blade
-Mirror Polished: both sides
<Material>
- Blade : ZDP189
*This knife is made from a three-layer steel of ZDP189 and SUS420J2. Despite being three-layer steel, it has been thoroughly hardened, boasting a hardness comparable to honyaki knives. The core ZDP189 reaches HRC67, while the SUS layer is 62±1, making it extremely hard and difficult to sharpen. As a result, this knife is challenging for beginners to handle.
- Handle:White resin
*Silver-wrapped handle
(It appears pure white in the image, but it is actually a slightly creamy color)
<Size & Weight>
-Handle to tip length: 273㎜
-Blade height: 48㎜
-Thickness: 2.8㎜
-Weight: 281g
<Brand name>
Shiroyama (made in Sakai, Osaka)
Shipping & Returns
Shipping & Returns
Shipping is free to the United States and Canada.
After receiving an order from the customer, the craftsmen in Sakai City attach a handle to the Japanese knife and, if requested, perform Honbazuke as well. Therefore, it takes approximately 2 to 4 weeks to deliver the product.
Please refer to our return policy.
What Makes This Knife Truly Special

Sakai Craftsmanship: Ultimate Hardness and Elegance
Crafted from ultra-hard ZDP-189 steel, this knife stuns even Sakai’s top sharpeners.
Hand-sharpened by Kohei Yamatsuka, son of master craftsman Tadayoshi Yamatsuka, it delivers unmatched sharpness and character.
Ideal for professionals who demand the best.
KIREAJI's Three Promises to You
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1. Crafted with Mastery
Each knife is meticulously handcrafted by skilled artisans in Sakai. Sharp, strong, and beautiful—every cut carries the spirit and pride of true craftsmanship.
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2. Thoughtful Care for Everyday Use
Every knife comes with a wooden saya (sheath) for safe storage and handling. For those who wish, we also offer expert hand sharpening (honbazuke) so your knife is ready to use from day one.
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3. Supporting a Lifetime of Use
KIREAJI knives are tools that grow with you. Through our paid aftercare services, we ensure your knife remains a trusted companion in your kitchen for years to come.

Why Many Product Photos Show Only the Blade
At KIREAJI, every knife is Made to Order.
That means your knife is completed — handle attached and final adjustments made — only after you place your order, by skilled artisans in Sakai, Japan.

Global Delivery from Sakai
Across the world, discerning customers seekgenuine Japanese knives crafted in Sakai.
At KIREAJI, we work alongside the master artisans of Sakai to fulfill that desire — shipping authentic Japanese knives straight from Sakai to kitchens around the globe.
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Precautions
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- If you wish to request Honbazuke, please select "Yes" when ordering. (Free of charge)
At KIREAJI, we provide the "Honbazuke" service free of charge upon request. Please note that this is a practical initial sharpening. As the knives are shipped internationally, the blade must be protected during transit. You can make the final adjustments yourself to suit your preferences. - Each piece is handmade and therefore unique. Please consider the weight and length as approximate.
- As buffalo horn is a natural material, color variations may occur, and the actual product may differ slightly from the photo.
- We carefully manage our inventory, but in the rare case an item is out of stock, we will notify you by email.
- If you wish to request Honbazuke, please select "Yes" when ordering. (Free of charge)
If you have any questions, please feel free to contact us. (Estimated reply time: within 10 hours)
Features of ZDP189
Recommended Users for ZDP189
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1. Experienced Professional Chefs
Ideal forbusy professional kitchenswhereedge retention is crucial, as the blademaintains its sharpness even after extended use. The sustainedprecision cuttingis a significant advantage indemanding culinary environments.
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2. Knife Enthusiasts with Advanced Sharpening Skills
Due to thedifficulty in sharpening ZDP189, it is best suited forusers with advanced sharpening techniques. For enthusiasts pursuingthe ultimate in cutting performance, this material represents anideal choice.
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3. Experts Seeking Minimal Maintenance
The superiorwear resistance means less frequent resharpeningis required, maintaining akeen edgeover extended periods. This makes it perfect for users who prioritizelong-term performance.

Before Using a Knife
Knives are crucial tools in cooking, and understanding their proper usage helps maintain quality, durability, and safety. We hope our customers will enjoy using their knives for a long time and enhance their cooking experiences.

Daily Care of Japanese Knives
We aim for all of you to use your knives for a long time. To achieve this, we have summarized what aspects of knife care you should pay attention to on a regular basis.

After-Sales Service
At KIREAJI, we offer reliable after-sales service through the Shiroyama Knife Workshop to ensure you can cherish your knives for years to come. For repair or maintenance inquiries, please apply from the link below.
Why Use a Good Knife?

No Japanese Knife, No Life
KIREAJI is a shop established in 2023, born from a strong desire to deliver high-quality Japanese knives to customers worldwide.