Short version: the Tojiro DP petty is the second knife to buy if your first one was a Tojiro DP gyuto— the same VG10 core, the same three-layer clad body, the same maintenance deal, shrunk to 150 mm. It is not the cheapest way to cover small work, and it is not the most comfortable. It is the one that matches what is already on your magnetic strip, and that turns out to matter more than it sounds.
What Tojiro actually publishes
The knife sold on the US listing is model F-802. That model number is worth writing down, because “Tojiro DP petty” is not one knife — Tojiro builds the DP petty in more than one length, and the listing title alone will not tell you which one is in the box.
On its own product page Tojiro publishes a blade length of 150 mm, a total length of 260 mm, a weight of 80 g, a core of VG10, outer layers of 13-chrome stainless steel, a handle described as “Reinforced Laminated Material (3Studs, Full-Tang)”, and an edging of “Double Bevel”. It describes the line as “An extremely durable and rust-resistant knife made to professional specifications” that “has achieved both professional sharpness and easy maintenance”.
That is a more complete disclosure than most makers manage at this price. It is also missing the number everyone actually asks about.
The number Tojiro leaves off
Tojiro publishes no Rockwell hardness figure for the F-802. Not a range, not an approximation, nothing. The 60 +/-1 HRC that the DP line is universally described by is published by the Japanese-knife specialist retailer’s spec table for the same model number — “Rockwell C scale : 60 +/-1” — alongside a blade material given as “VG-10(Core), Cobalt Alloy Steel by 3-Layers Stainless Steel”.
We print both, separately, and say which is which. That distinction is the whole reason this site exists: a figure from the maker and a figure from a retailer are not the same class of evidence, and quietly attributing the second to the first is how a spec table stops being worth reading. The number is almost certainly right — it is consistent across every specialist listing of the DP line — but it is not Tojiro’s number, and hardness is exactly the spec where provenance ought to be stated.
There is a second, smaller disagreement worth flagging. Tojiro gives the weight as 80 g. The Amazon listing’s feature bullet says “3.2 oz (90 g)”, while the dimensions block on the same listing gives about 0.18 lb, which is 80 g. The listing contradicts itself. We print the maker’s 80 g and report the disagreement rather than splitting the difference, because an averaged number would be a number nobody published.
150 mm, and why the length is the real decision
“Petty” covers a genuinely wide range — a 114 mm forged German utility knife and a 152 mm Damascus-clad Japanese one are barely the same tool. At 150 mm the F-802 sits firmly at the long end, and that has consequences in both directions.
What it buys you is board work. A 150 mm blade will halve and slice a whole shallot, break down a chicken thigh, portion a block of cheese, take the skin off a melon and split a bread roll without ever feeling short. It is the size where a petty stops being a big paring knife and starts being a small chef’s knife. If you own a 210 mm gyuto, this is the blade that covers everything the gyuto is too big and too tall for, which is more of a kitchen’s work than most people expect.
What it costs you is in-hand control. Turning a potato in your palm, hulling strawberries, coring a tomato held in the air — a 150 mm blade is awkward at all of those, and a proper 80-90 mm parer does them better and costs less. If in-hand work is the gap you are trying to fill, this is the wrong knife and the petty knife guide sets out the sizes that are not.
The bolster and the full tang
Two construction details on this knife are unusual for a Japanese blade at this money, and both come straight from Tojiro’s own description.
The handle is full tang, riveted with three studs — a Western build rather than the friction-fit wa handle a lot of Japanese knives use. And there is a metal bolster, which Tojiro says “is very hygienic and prevents stain and dirt from being accumulated between blade and handle”. The Amazon listing names that part as 18-8 stainless steel.
That is a real, checkable claim about the seam where blade meets handle, and it is the part of a cheap knife that usually fails first. It is also, honestly, part of why the knife weighs what it does: 80 g is not light for 150 mm of thin Japanese blade, and the bolster is where a chunk of that sits. Whether you read that as reassuring or as dead weight in front of your fingers is a matter of preference, not of specification.
What it is like to own
The proposition is identical to the DP gyuto, which is the point. A hard stainless core ground thin, wrapped in soft stainless for toughness and corrosion resistance, finished at roughly 15° per side. VG10 at around 60 HRC holds a much more acute edge than German steel can without rolling, and on small work — where you are making a dozen precise cuts rather than three hundred rough ones — that shows up as the knife going through a shallot instead of splitting it.
It also means the same rules apply. No bones, no frozen food, no twisting the blade to lever something apart, no dishwasher, and no grooved honing steel. At 60 HRC an edge does not bend back into line when you steel it; it breaks off in pieces too small to see. A fine ceramic rod or a strop is the between-sharpenings tool, and a 1000/6000 combination stone is the once-or-twice-a-year one. A 150 mm blade is a genuinely pleasant thing to learn stone work on, incidentally — short enough to keep a consistent angle across, and cheap enough that a bad session is not a disaster.
The three things it does badly
- It is expensive for what a petty gets used for. A petty makes a handful of cuts at a time. The edge retention you are paying for in hard steel barely gets tested before the knife goes back on the strip, and a forged budget utility knife will feel sharp for as long as most kitchens need. This is the one category where the value argument for hard steel is weakest, and pretending otherwise would be dishonest.
- The handle is functional and nothing more. Laminated composite, symmetrical, hard-wearing, fine in a wet hand, and completely without character. On a knife you pick up for ninety seconds at a time that matters less than it does on a gyuto — but it is where the gap to a pakkawood Shun goes.
- It punishes carelessness more than its size suggests. Small knives get used for stupid things: prising, scraping, opening packaging, poking at something frozen. A 60 HRC edge chips at all of those. The gyuto lives on a board and gets respect; the petty lives in the drawer and gets abused, which is exactly the wrong way round for this steel.
How it compares
Tojiro DP petty against the other petty and utility knives we track| | Tojiro DP | Mercer 5-inch | MAC 5-inch | Shun 6-inch |
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| Blade length | 150 mm | 127 mm | 125 mm | 152 mm |
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| Steel | VG10 core | X50CrMoV15 | Molybdenum-vanadium | VG-MAX core |
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| Published hardness | 60 +/-1 HRC (retailer, not maker) | ~58 HRC | Not published | Not published |
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| Construction | 3-layer clad, full tang, bolstered | Forged, full tang, bolstered | Single steel, taper-ground | VG-MAX core, 34-layer Damascus |
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| Published weight | 80 g | Not published | Not published | Not published |
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| Maintenance | Ceramic rod or strop | Steel rod | Ceramic rod or strop | Ceramic rod or strop |
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| Really for | Matching a hard Japanese gyuto | Doing the job cheaply | The best cutting feel here | Matching a Shun Classic |
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Against the Mercer 5-inch utility this is the hard-versus-soft argument in miniature, and the Mercer wins it more often than it does in the chef’s-knife category: it is a fraction of the price, it can be steeled, and it does not care if you hit something. Against the Shun 6-inch the cutting cores are near-equivalent and the difference is Damascus cladding, a pakkawood D-handle and roughly double the money — and notably, Shun does not publish a hardness figure for it while the Tojiro at least has one in circulation. The MAC 5-inch is the connoisseur’s answer on grind and the worst on disclosure: no hardness, no weight, nothing.
The full five-way table, including the 114 mm Wüsthof, is in the petty roundup.
Left-handed buyers
Nothing about this knife is handed. Tojiro gives the edging as “Double Bevel”, the specialist spec sheet spells it out as “Double edged (available for both left and right-handed)”, and the handle is symmetrical rather than a shaped D. That is not a given in this price band — several Japanese knives near it use an asymmetric grind or a right-handed D-handle, which the left-handed guide goes through.
Who should buy it
Buy the DP petty if you already own a Tojiro DP gyuto or santoku and want the small knife to match — same steel, same angle, same stone session, no thinking. Buy it if you want a 150 mm board-capable second knife in genuinely hard stainless for the least money that involves no compromise on the steel. Buy it if you are left-handed and tired of checking.
Buy something else if this would be your only small knife and you mostly work in the hand rather than on a board; if your kitchen runs on soft German steel and you want one tool you can steel with everything else; or if you have not bought a main knife yet, in which case the buying order says put the money into the gyuto first and come back for this.
How we reviewed this
We do not own this knife and have not cut with it. This review reads the specifications Tojiro publishes on its own site for the F-802, the specialist retailer’s spec table for the same model number, and the live retail listing, against the published figures for its rivals and the known behavior of VG10 at this hardness. Where the maker and the listing disagree — the weight — both numbers are printed. Where the maker publishes nothing — the hardness — we say so and name who does. Anything nobody states is marked Not published rather than estimated. Our methodology page sets out the whole approach.