Japanese sushi knives have been meticulously crafted for over 600 years. Traditional knives are made of high carbon steel to be able to slice or cut sashimi without breaking the fibers. But one knifemaker, Yusuke Sawada, questions if the tradition has reached its peak.

WSJ explains how Nenohi Cutlery used materials no one thought would work and found cult status as knife artisans among top sushi chefs.

Chapters:
0:00 Japanese sushi knives
1:48 Materials
3:03 Forging and heat treatment
4:34 Shaping
7:14 Personal preference
8:39 Ace craftsmen dwindling

WSJ's Coveted highlights the precision and process behind expertlycrafted cult favorites — from the pencils beloved by Disney animators to the sushi knives breaking thousands of years of Japanese tradition. These stories show how the smallest everyday items can be transformed into the ultimate luxury splurge.

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