Most major Japanese brands are sharpened to 15* on each side.
While it's impossible to read Shun's collective mind, I suspect Shun sharpens to 16* to provide some very slight rationale for purchasing Shun sharpening gear -- such as their electric knife sharpener -- also set to to 16*
Shun's electric knife sharpener is manufactured by the same (American) company which makes Chef's Choice, Edgecraft; and it's very fair to say that the Shun is the company's bottom of the line Asian knife sharpener (they make four others). Any of the Chef's Choice machines will grind a Shun to 15*, and both the knife and the machine will work perfectly well.
Furthermore, there's nothing magic about manufacturers' suggested angles and/or supplied edge geometry. Sometimes they're the best for the knife, sometimes they're not even close. A good sharpener considers the shape of the knife, the material of which it's made, and the use to which it will be put, before deciding on the edge angle, type of bevelling and symmetry.
Freehand sharpening is the most comprehensive and flexible system. A good set of stones is NOT a cheap investment though. Not that you can't find a couple of adequate surfaces for not too much, but if you're into doing really good work and want a versatile set, it will cost you.
Rod-guide systems are probably the closest results you can get to freehanding. Better under many circumstances. The learning curve is much shallower. Cost goes from low-medium to high-medium, but at least it's pretty well capped -- that is, there's a limit to how much you can spend on your rod-guid system. The best home system is the Edge Pro Apex. Highly recommended.
There are only a few electric sharpening machines which are (a) not harmful to your knives; and (b) do a decent or better job on them. We may as well limit the universe to Chef's Choice, since the others which fit under our criteria umbrella are expensive and/or unreliable. Chef's Choice machines work extremely well, and contrary to a great deal of uninformed opinion won't harm your knives. The edge is not as good as can be produced by a good free hander; but the edge is produced quickly and there's no BS about learning a new skill. Although they do make a machine which will handle the most common edges of Western and Asian knives respectively, the weakness of Chef's Choice machines is their lack of versatility. Nevertheless, they are the best choice for a lot of people because they're simple enough to use.
Ceramic "V" stick systems like the Spyderco Sharpmaker are useful for "touch ups" but are way too slow to get your knives really sharp. Also, they don't really do much in the way of getting a precision edge angle; they just make you feel better about your inaccuracy. Nice to have around if you want something that straddles the difference between a medium grit sharpening stone and a honing rod, without being as good as either. Of the V ceramics, I slightly prefer the Idahone to the Spyderco, and the Spyderco to the Lansky. Those are the Big 3, and no matter how I rate them, they're inherently equal. Just make sure the set in which you're interested can be set to the angles you want.
Pull throughs come in two basic flavors: Table tops like the Mino Sharp, Henckels, Wusthof, Chef's Choice, etc., and "'V' grooves" with carbide wheels or rods. The "'V' grooves" themselves may be devided into those which are dragged over the blade, and those which the blade is pulled through. Just to make matters confusing, you can easily think of the table tops as a species of V groove. With two exceptions, these are either a waste of time or will destroy your knives.
The table tops are very slow. To take a knife from barely dull to barely sharp takes something like 60 passes. And no matter how many times you pull the knife through the slot, they won't get a knife sharper than medium sharp. Furthermore, they get dirty easily and range from difficult to impossible to clean. It's not a question of aesthetics, the abrasive surfaces don't get dirty so much as "load up" and "clog." When they're clogged, they don't work -- at all. There are two which are best of the bunch -- MinoSharp and Chef's Choice. Because they're easy to use and fairly cheap, it's how some people roll. Try not to be one.
As to the rest of the V grooves, including the "miracle" sharpeners you see advertised on TV like the ones with the protective handle you drag across the knife, or the ones with the set of rods which clamps to the table. They do not actually sharpen so much as rip your knife's edge into teeth, which then cut like a saw. These are effective -- that is, your knife will cut after being sharpened; but it won't cut correctly and neither the edge nor the knife will last very long. Of these, Chantry sharpeners will screw up your knives, but they look doing it. Not a bad choice if you can live with the rough cutting and doing damage to your cutlery.
There's often an exception to the rule, and this time it's the Blackie Collins sharpener.
"Sharpening steels" or "rods" including "diamond" steels will screw up your knives something fierce. If you're into "fast and dirty," some of them will put a very toothy edge on quickly. Not recommended. On the other hand, "honing steels" or "rods" are a very useful knife maintenance tool. Unfortunately terminology is inconsistent and the words "sharpening" and "honing" are confused and/or used interchangeably. If you're looking for a honing steel, always look for the terms "fine," "extra-fine," "smooth," and/or "glass smooth." Unless you very much know what you're doing (and then you're not coming to me for advice) you'll stick with round rods. Right now the class of the bunch is the Idahone fine ceramic rod (about $25 at this writing).
BDL
PS. Full disclosure: I've been a free hand sharpener since 1962, and have used all sorts of sharpening equipment. I'm currently using a set of four stones, including two Norton India stones, and two Arkansas stones; and an old Henckels extra fine steel (not available anymore) -- the Hand American borosilicate glass rod went to honing heaven and will not be replaced. Waterstones are better than Arkansas stones for almost all purposes and nearly all users.
While it's impossible to read Shun's collective mind, I suspect Shun sharpens to 16* to provide some very slight rationale for purchasing Shun sharpening gear -- such as their electric knife sharpener -- also set to to 16*
Shun's electric knife sharpener is manufactured by the same (American) company which makes Chef's Choice, Edgecraft; and it's very fair to say that the Shun is the company's bottom of the line Asian knife sharpener (they make four others). Any of the Chef's Choice machines will grind a Shun to 15*, and both the knife and the machine will work perfectly well.
Furthermore, there's nothing magic about manufacturers' suggested angles and/or supplied edge geometry. Sometimes they're the best for the knife, sometimes they're not even close. A good sharpener considers the shape of the knife, the material of which it's made, and the use to which it will be put, before deciding on the edge angle, type of bevelling and symmetry.
Freehand sharpening is the most comprehensive and flexible system. A good set of stones is NOT a cheap investment though. Not that you can't find a couple of adequate surfaces for not too much, but if you're into doing really good work and want a versatile set, it will cost you.
Rod-guide systems are probably the closest results you can get to freehanding. Better under many circumstances. The learning curve is much shallower. Cost goes from low-medium to high-medium, but at least it's pretty well capped -- that is, there's a limit to how much you can spend on your rod-guid system. The best home system is the Edge Pro Apex. Highly recommended.
There are only a few electric sharpening machines which are (a) not harmful to your knives; and (b) do a decent or better job on them. We may as well limit the universe to Chef's Choice, since the others which fit under our criteria umbrella are expensive and/or unreliable. Chef's Choice machines work extremely well, and contrary to a great deal of uninformed opinion won't harm your knives. The edge is not as good as can be produced by a good free hander; but the edge is produced quickly and there's no BS about learning a new skill. Although they do make a machine which will handle the most common edges of Western and Asian knives respectively, the weakness of Chef's Choice machines is their lack of versatility. Nevertheless, they are the best choice for a lot of people because they're simple enough to use.
Ceramic "V" stick systems like the Spyderco Sharpmaker are useful for "touch ups" but are way too slow to get your knives really sharp. Also, they don't really do much in the way of getting a precision edge angle; they just make you feel better about your inaccuracy. Nice to have around if you want something that straddles the difference between a medium grit sharpening stone and a honing rod, without being as good as either. Of the V ceramics, I slightly prefer the Idahone to the Spyderco, and the Spyderco to the Lansky. Those are the Big 3, and no matter how I rate them, they're inherently equal. Just make sure the set in which you're interested can be set to the angles you want.
Pull throughs come in two basic flavors: Table tops like the Mino Sharp, Henckels, Wusthof, Chef's Choice, etc., and "'V' grooves" with carbide wheels or rods. The "'V' grooves" themselves may be devided into those which are dragged over the blade, and those which the blade is pulled through. Just to make matters confusing, you can easily think of the table tops as a species of V groove. With two exceptions, these are either a waste of time or will destroy your knives.
The table tops are very slow. To take a knife from barely dull to barely sharp takes something like 60 passes. And no matter how many times you pull the knife through the slot, they won't get a knife sharper than medium sharp. Furthermore, they get dirty easily and range from difficult to impossible to clean. It's not a question of aesthetics, the abrasive surfaces don't get dirty so much as "load up" and "clog." When they're clogged, they don't work -- at all. There are two which are best of the bunch -- MinoSharp and Chef's Choice. Because they're easy to use and fairly cheap, it's how some people roll. Try not to be one.
As to the rest of the V grooves, including the "miracle" sharpeners you see advertised on TV like the ones with the protective handle you drag across the knife, or the ones with the set of rods which clamps to the table. They do not actually sharpen so much as rip your knife's edge into teeth, which then cut like a saw. These are effective -- that is, your knife will cut after being sharpened; but it won't cut correctly and neither the edge nor the knife will last very long. Of these, Chantry sharpeners will screw up your knives, but they look doing it. Not a bad choice if you can live with the rough cutting and doing damage to your cutlery.
There's often an exception to the rule, and this time it's the Blackie Collins sharpener.
"Sharpening steels" or "rods" including "diamond" steels will screw up your knives something fierce. If you're into "fast and dirty," some of them will put a very toothy edge on quickly. Not recommended. On the other hand, "honing steels" or "rods" are a very useful knife maintenance tool. Unfortunately terminology is inconsistent and the words "sharpening" and "honing" are confused and/or used interchangeably. If you're looking for a honing steel, always look for the terms "fine," "extra-fine," "smooth," and/or "glass smooth." Unless you very much know what you're doing (and then you're not coming to me for advice) you'll stick with round rods. Right now the class of the bunch is the Idahone fine ceramic rod (about $25 at this writing).
BDL
PS. Full disclosure: I've been a free hand sharpener since 1962, and have used all sorts of sharpening equipment. I'm currently using a set of four stones, including two Norton India stones, and two Arkansas stones; and an old Henckels extra fine steel (not available anymore) -- the Hand American borosilicate glass rod went to honing heaven and will not be replaced. Waterstones are better than Arkansas stones for almost all purposes and nearly all users.









