Tojiro DP vs MAC MTH-80: Which Holds Its Edge Longer?
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Owners consistently report longer stretches between sharpenings on the MAC MTH-80 — often six to eight weeks of regular cooking versus four to six on the Tojiro DP. That gap is real, but so is the price difference: the MAC usually costs noticeably more, and the DP is easier and cheaper to bring back once it does dull. If you cook daily and genuinely hate sharpening, buy the MAC. If you don’t mind a whetstone every few weeks and want to spend less to get there, the DP is the better buy.
Both knives use a stainless steel in the same rough performance class, so the temptation is to assume they’ll behave the same in daily use. They don’t, and the reason has less to do with the steel itself than with what each maker did with it.
Same class of steel, different heat treatment
The Tojiro DP runs a VG-10 core at roughly 59–60 HRC, clad in a softer stainless for protection. The MAC MTH-80 uses MAC’s own high-carbon molybdenum-vanadium alloy, described by the maker as “sub-zero tempered” — a treatment process meant to lock in a finer, more stable grain structure. Published hardness figures for the MTH-80 range from 59 to 61 HRC depending on the source, which is close enough to the DP’s number that hardness alone doesn’t explain the edge-life gap owners describe.
What likely does explain it: MAC’s heat treatment and alloy balance are tuned specifically for that “holds an edge a long time, still comes back easily on a stone” combination the Professional series is known for. It’s a narrower, more deliberate design goal than Tojiro pursued with the DP, which was built to be an excellent knife at a low price — not necessarily the single best possible edge-retention number in its class.
At a glance
| Spec | Tojiro DP (210mm gyuto) | MAC MTH-80 (8″, dimpled) |
|---|---|---|
| Steel | VG-10, ~59–60 HRC | Molybdenum-vanadium, ~59–61 HRC |
| Reported edge life | 4–6 weeks, home use | 6–8 weeks, home use |
| Edge feature | Plain edge | Granton (dimpled) — sheds sticky food |
| Weight | Very light | Light, slightly heavier at the heel |
| Warranty | Standard manufacturer | 25-year |
| Price tier | Budget-to-lower-mid | Mid-to-premium |
| Watch out for | Thin cladding shows wear | Chips on bone, frozen food, hard squash |
The dimples matter more than people expect
The MTH-80’s Granton edge — the row of shallow oval dimples along the blade — creates small air pockets that stop thin slices of cucumber or potato from clinging to the steel. It’s a small thing until you’re two hours into meal prep and you notice you’re not stopping every few cuts to peel a slice off the blade. The DP doesn’t have this feature at all, which isn’t a flaw exactly, just a different design decision.
Both knives are stamped rather than forged, both are light for their length, and both reward a light touch rather than heavy chopping — neither is the knife you want for breaking down a chicken carcass or splitting a butternut squash. Owners of both knives report chipping when they’ve been used that way, which is really a reminder that thin, hard stainless blades in this category are built for precision work, not force.
What “holds an edge longer” costs you in practice
The honest trade is this: MAC’s better edge retention is real, but it isn’t free, and it isn’t enormous. You’re talking about a difference of maybe two extra weeks between sharpenings for most home cooks — genuinely useful if you cook every day and sharpening is a chore you’d rather avoid, much less meaningful if you’re already comfortable on a whetstone and don’t mind the extra session.
The DP’s counterpoint is that when it does need sharpening, its thinner factory grind takes less work to restore, and the knife costs less to begin with — so the total cost of ownership over a few years is closer than the edge-retention numbers alone would suggest.
Who should buy which
Buy the MAC MTH-80 if you cook daily, hate interrupting your week for sharpening, and don’t mind paying more up front for fewer trips to the stone. Buy the Tojiro DP if you’re building a knife collection on a budget, you’re fine sharpening every few weeks, or you want to see how you get on with a serious Japanese knife before spending MAC money on one.
Frequently asked questions
Does the MAC MTH-80 really hold an edge longer than the Tojiro DP?
Based on consistent owner reports, yes — typically six to eight weeks of regular home cooking versus four to six for the DP. The gap comes down to MAC’s specific heat treatment, not a dramatically different steel.
Is the MAC MTH-80 worth the extra cost over a Tojiro DP?
If you cook often enough that sharpening frequency is a real annoyance, yes. If you’re comfortable sharpening every few weeks, the DP delivers most of the performance for meaningfully less money.
Can either knife handle bones or frozen food?
No — both are thin-bladed precision knives, and owners of each report chipping when they’re used on bone, frozen food, or hard squash. Keep a separate, tougher knife for that kind of job.
Steel and Strop tests and compares kitchen knives and sharpening gear. Edge-retention figures above reflect consistent patterns in owner reporting rather than a single lab measurement, since real-world edge life depends on cutting board, technique, and what’s being cut as much as the steel itself.
