How to Measure Your Japanese Knife

Trying to figure out how Japanese kitchen knives are measured? Whether you’re shopping for your first Gyuto or trying to understand the size of your Deba, it’s important to know how these knives are sized—and why it matters. This guide covers everything you need to know about how Japanese knives are measured, in both inches and millimeters.

Where to Measure a Japanese Knife

For most Japanese knives, the blade length is measured from the tip of the blade to where the blade meets the handle (the machi or handle attachment point). This is the standard method for knives such as:

Deba Knife Measurement

The Deba knife is an exception. It’s traditionally measured from the tip to the heel (the back corner of the blade, near the handle). This is because the heel portion of the Deba is heavily used for butchering fish and poultry, so the effective cutting edge is more relevant than the handle attachment.

Why Blade Measurement Matters

Knowing exactly how a knife is measured helps you:

• Choose the right size for your hand, cutting tasks, and kitchen space
• Compare knives across brands accurately
• Select proper accessories like knife blocks, saya covers, and sharpening stones

Do All Brands Measure the Same Way?

No—some knife makers may measure from tip to heel, while others include the machi (gap between handle and blade) or even part of the handle. Always check how a knife is measured before buying, especially when comparing different brands or regions (Japanese vs Western knives).

Need Help Choosing the Right Size?

If you’re unsure about what size knife is right for you—or how it's measured—feel free to email us at info@echefknife.com. We're here to help with expert guidance and personalized recommendations.