Guardian Life & Style (US) • Jan. 14, 2026, 8:34 p.m.

The C-200 vibrates 30,000 times per second, and as our pro chef tester found, it’s not as gimmicky as it sounds This versatile Japanese chef’s knife has lasted longer than some of my relationships Sign up for the Filter US newsletter, your weekly guide to buying fewer, better things Knife technology evolves at glacial speed. If an 18th-century chef time-traveled to my present-day kitchen, they’d be terrified of the immersion blender, thrilled by the nonstick pans and perplexed by the can opener.

But they could pick up any of the knives in my drawer and get to work on a ratatouille. As long as they didn’t pick up my ultrasonic knife.

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