Santoku 155mm Corrax Stainless SanMai Apex Ultra Core


Very few knives boast the level of fit and finish that can be found in a Guldimann forged blade like this. Every step has been scrutinized for the absolute best performance, from the scientific analysis and testing of the steels grain structure, selection of cladding material, heat and cryo treatments, geometry and even techniques used in forging that increase carbon retention and improve grain structure.

This is something else altogether.

Apex Ultra clad in Uddeholm Corrax stainless steel. The cladding material and the core steel has been tested using Ultrasonic Contact Impedance to ensure that every inch of the blade has a homogeneous hardness quality throughout. The cladding is a consistent 40HRC and the core is 65HRC.

Precision convex ground and sharpened using using custom water cooled grinders and state of the art NOWI PRO guided sharpening on Japanese whetstones to achieve an absolutely consistent bevel, which is set at 16 degrees for a razor sharp and fine cutting edge.

Marco has completed this beautiful piece of precision craftsmanship with black and white ebony. Stunning hand engraved textures on the white ebony bolster, incredible fit and finish on the leather lined saya and absolutely perfect fit and finish on every detail.

Product Specification

Blade Type: Santoku

Edge Length: 155mm

Spine Heel: 3.75mm

Spine Mid: 1.69mm

Spine Tip (20mm before): 1.1mm

Blade Height: 55mm

Weight: 156g

Cutting Edge Steel: Apex Ultra

Stainless: No

HRC: 65

Blade Construction: 3 Layer (San Mai)

Blade Finish: Textured and Acid Etched (Forced Patina)

Grind: Convex

Handle Construction: Hidden Tang

Handle Materials: Black & White Ebony

Handedness: Ambidextrous

Saya Included: Yes

Shipping & Returns


We process orders 5 days a week (Monday - Friday) and ship from our shop in Berlin, Germany. We ship with FedEx, UPS and Deutsche Post.

We are happy to offer free international shipping on a variety of orders depending on location and order value. You can check to see where things sit for you here.


At Modern Cooking we want our customers to be inspired and delighted by the products they purchase through our shop.

However, we understand that you may need to return products occasionally. If you are not entirely happy, you can return your purchase in its original condition within 14 days for a refund. Please email if you wish to return any goods.

In the unlikely event that you receive faulty goods or your order is damaged in transit, please contact us for instructions on how to return the goods as in this case we will meet the cost of return postage, though only if this is arranged through our authorised carriers. Any claim for refund or exchange resulting from faulty goods or goods damaged in transit must be raised within 5 business days.

All Modern Cooking logistics partners provide insurance in case of damage, but the coverage is only valid if we are notified within 5 business days. Please make sure to inspect your order immediately upon receipt to ensure that there is no damage.

Once we have the goods back, we will issue a full refund or send replacements where possible, as you prefer.

Product Care:

Cleaning: Clean by hand with warm water. Avoid wetting the handle when possible. 

Sharpening: We advise using whetstones to sharpen your knives and a honing rod or steel to maintain the burr between sharpening sessions. 

Reactive Steels: Reactive steels like Aogami Super, Apex Ultra or one of the many premium reactive German and Swedish steels are susceptible to rust if not properly cared for. In this case we advise that you keep the knife dry between uses and when storing the knife for longer periods wiping the knife blade with Tsubaki oil or another food safe oil is a wise choice. This will not stop a patina forming on the blade, but it will stop rust. A patina can be a beautiful personal feature on your knife and helps to stop rust forming. So, dry your knife regularly between uses, store in a dry place and apply some Tsubaki oil from time to time when storing for long periods. 

A reference guide to steel types

Handle Care: If you have a knife with a non-stabilised wooden handle, you can apply Tsubaki oil or another food safe oil to your handle from time to time. Food safe wax can be applied to both stabilised and no-stabilised wooden handles. Never apply hot wax or oil as you risk warping or damaging the handle.