Miyabi Kaizen vs Mercer Millennia
Based on tests by America's Test Kitchen (Jun 2025). How we score
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From 1 tester: America's Test Kitchen
From 1 tester: America's Test Kitchen
Amazon prices as of Sep 30, 2:51 AM EDT (details)
What the testers found
America's Test Kitchen's top-rated bread knife, with full marks for blade and handle. "Its blade is long enough to span large loaves and pastries and tall enough to direct easily through thick sandwiches." It has "just the right number of tall, reasonably sharp serrations," though it scored a little lower than the Miyabi for sharpness (2.5 vs 3 of 3). "A long, rubbery handle was comfortable for hands of all sizes to grip." ATK didn't test long-term durability.
| Criterion | Miyabi Kaizen | Mercer Millennia |
|---|---|---|
| Blade | 2.5/3 | 3/3 |
| Handle | 2.5/3 | 3/3 |
| Sharpness | 3/3 | 2.5/3 |
From America's Test Kitchen: The Best Serrated (Bread) Knives (updated June 25, 2025)
Specs side by side
| Spec | Miyabi Kaizen | Mercer Millennia |
|---|---|---|
| Price | $189.95 | $15.95 |
| Cost per year | — | — |
| Warranty | — | — |
| Usable blade | 8.5 in (America's Test Kitchen) | 9.2 in (America's Test Kitchen) |
| Serrations | 33, 0.85 mm tall (America's Test Kitchen) | 29, 1.2 mm tall (America's Test Kitchen) |
| Handle | Micarta, 5 in (America's Test Kitchen) | Polypropylene and Santoprene, 5.75 in (America's Test Kitchen) |
Sources: America's Test Kitchen: The Best Serrated (Bread) Knives (updated June 25, 2025), Manufacturer specs via Amazon listing
