The honesuki and the deba look related. Both are short, thick, pointed, and usually sharpened on one side, and English listings sometimes describe either one as a boning knife. Japanese shops sell them for different animals. I read how a Sakai knife shop describes each of them to Japanese customers, and then compared the weights and prices of both knives from the same maker on an export site.
If you only want my pick for chicken and other meat on the bone: the Sakai Takayuki INOX PRO honesuki 150mm, $113.99 and in stock when I checked on 20 October 2026. If you mostly break down whole fish, the deba further down is the better buy.
What the shop says each knife is for
Sakai Ichimonji Mitsuhide introduces the deba by saying that breaking down fish is the most basic skill in Japanese cooking, and that the deba is the knife used for it. It describes the blade as very thick and wide even among Japanese knives, with a heavy feel in the hand, and gives the reason: so that the blade does not lose against the hard bones and heads of fish.
The same shop describes the honesuki as a knife used mainly to cut meat such as beef away from the bone. It says the blade is thick and often sharpened on one side so the edge does not chip easily when it touches bone, and it adds that the honesuki is lighter and handier than a deba, so some people use it to break down fish.
So the shop compares the two itself. The deba is the fish knife, and its weight is part of how it works. The honesuki is the meat knife, and the shop mentions the lighter weight as the reason some cooks carry it over to fish.
The weight difference, measured on one maker
Hocho-Knife lists both knives from Sakai Takayuki in the same AUS8A stainless steel, which makes a fair comparison. On 6 October 2026 the numbers were these.
The INOX honesuki 150mm weighs 180g and costs $118.99. The INOX ai-deba 150mm weighs 230g and costs $167.99. Both are single-edged for the right hand. Ichimonji treats the ai-deba as a slimmer kind of deba, though this one is listed at the same weight as the regular 150mm deba from the same maker. At the same blade length the deba is 50g heavier, a little over a quarter more, and 49 dollars more expensive.
The gap grows quickly with length. In the carbon steel line from the same maker, the deba is listed at 230g for 150mm, 320g for 180mm and 440g for 210mm. For scale, the INOX gyuto 210mm from the same maker is listed at 180g, so a deba of that length is well over twice as heavy.
Sabun shows the same pattern in its stainless line: the honesuki 135mm is 150g and $87.99, and the deba 150mm is 225g and $141.99.
What each one does better
A deba is built to go through the head and backbone of a fish. The weight does the work when you press the heel down through the collar, and the wide single-edged blade then rides flat along the backbone to take the fillet off. For a home kitchen Ichimonji calls 150mm the standard size. It recommends about 210mm for cooks who handle sea bream and yellowtail, and 100 to 135mm for small fish.
A honesuki is built for joints. The triangular blade has a fine, stiff point that goes into the gap between two bones, and the knife is light enough to turn quickly in the hand. That is why it is popular for taking a chicken apart. It will ride along a bone without chipping, but the two Sakai shops I read say only that it resists chipping. Neither says it is meant for chopping through bone.
Not every deba is meant for bone either. Ichimonji describes the mioroshi deba as a slimmer and thinner deba made only for filleting, and says it cannot be used on bones because the edge will chip. If a listing says mioroshi, treat it as a filleting knife. I set the deba family against the Western fillet knife in deba vs fillet knife.
Can a honesuki do fish, and can a deba do chicken
Both answers are yes, with limits.
Ichimonji says some people use the honesuki on fish because it is lighter than a deba. For small and medium fish that works, especially for filleting. The limit is the head and backbone of a larger fish, which is the job the heavy deba was designed for. A 180g knife does not have the mass for it.
Going the other way, there is a deba made for poultry. In its guide to deba types, Ichimonji lists the kashiwa deba, a deba for breaking down a whole chicken. Kashiwa is an old word for chicken meat that is still used in western Japan. So using a deba on chicken is an established practice in Japan. An ordinary deba will do it too, though the wide blade is slower around small joints than a honesuki.
Left-handed cooks
Both knives are normally single-edged for the right hand, and a left-handed deba costs much more. The Sakai Takayuki white steel deba 150mm is $114.99 for the right hand and $207.99 for the left. In the stainless INOX line the ai-deba 150mm is $167.99 for the right hand and $296.99 for the left.
The honesuki has a cheaper way out, because a few are made double-edged. The INOX PRO honesuki is listed as double-edged for both hands at $113.99. I counted the grinds across all the honesuki on that site in honesuki vs boning knife, and explained how a single-edged blade steers in single bevel vs double bevel.
Which one to buy
Buy a honesuki if most of what you cut on the bone is chicken, duck, rabbit or cuts of meat, and fish is occasional and small.
Buy a deba if you bring home whole fish and want to take the head off and fillet it yourself. Choose 150mm, the size Ichimonji calls standard for home use, unless you regularly handle fish as large as sea bream or yellowtail.
If you do both often, they are two knives. The honesuki is the one that can stand in for the other more easily, and it is the cheaper of the two.
Four knives, checked on 6 October 2026
For chicken and meat, and for either hand: the Sakai Takayuki INOX PRO honesuki 150mm at $113.99. AUS8A stainless, 133g, double-edged, in stock.
A stainless deba: the Sakai Takayuki INOX ai-deba 150mm at $167.99. AUS8A stainless with a magnolia handle, 230g, single-edged for the right hand, in stock. Stainless is the easier choice for a knife that spends its time wet.
A less expensive deba in carbon steel: the Sakai Takayuki Kasumitogi white steel deba 150mm at $114.99. 230g, single-edged for the right hand, in stock. It will rust if it is left wet, so it needs wiping during the work and drying afterwards. I covered what to expect in patina or rust.
The same deba for the left hand: the left-handed Kasumitogi white steel deba 150mm at $207.99, in stock.
If you want to check a knife shop before you pay it, this one included, I wrote down what a buyer can actually verify in where to buy Japanese knives online.
For a left hand the honesuki is harder to find than the deba. On 21 October 2026 neither left-handed single-edged honesuki at this shop was in stock, and I listed the double-edged ones that work in either hand in best honesuki knife.
Disclosure
I have four approved affiliate partnerships: two with knife retailers, Hocho-Knife and SharpEdge, and two with Japanese language-learning companies unrelated to knives. This page carries five tracked links, all to Hocho-Knife: four knives, and a second link to the INOX PRO honesuki near the top. At about 10 percent, that is roughly 11 dollars for the honesuki, 17 dollars for the stainless deba, 11 dollars for the carbon steel deba and 21 dollars for the left-handed one. The knife I suggest for most readers is the cheapest of the four. My full affiliate disclosure is here.
Sources, checked on 6 October 2026: the Japanese deba page, the guide to deba types and the honesuki page of Sakai Ichimonji Mitsuhide; the Jikko Japanese page for the honesuki; and the Hocho-Knife product pages for the knives named above.