Yeah, I could certainly understand it if sparring demonstrated just a smaller subset of the techniques used in kata, but that doesn't address the differences I cited.
Once again, I could understand if kata represented an ideal execution of technique while the sparring version ended up being sloppier or more abbreviated. That's not really what I'm seeing though.
I'd post video of karate kata and sparring so that I could point out the specifics of the disconnect I'm seeing (in terms of body mechanics, footwork, stances, hand positioning, and specifics of techniques), but I'm afraid there would be complaints that the practitioners I selected weren't properly representative. Would you care to pick a kata clip and a sparring clip that you feel demonstrate good performance and then we can discuss what each of us sees in the comparison?
Hmmm ... interesting. Based on past comments I suspect some of the other karate practitioners around here might disagree with that.
Ok, so first heres the best rendition of Keecho Il boo (basic form 1 in my style) that I could find.
Bear in mind stances are usually only that deep for conditioning,
The bunkai for the first two moves (well realy about half the second, the step acts more like a sweep then stepping to punch, or you could rotate and throw that way), is blocking/Trapping a kick, then stepping in to sweep with the right leg. You can punch if you want I guess but if you sweep hard enough you dont really need to.
Abernathy teaches like this:
And its a fairly common thing to see in Sanda/Kickboxing. Im trying to remember the K! match were a guy did it like 4 times just to spite his opponent, he did both inside like in the form and outside. But heres a sanda coach teaching a version of it. Difference is going to the outside lets you do sweep kinda to the front, and moving to the inside is more of a back sweep. Like this sweep from the Rossian Tie
Other than enunciated stance in the forms (and different angle of sweeps depending on if youre moving inside or out) the trap/block into the sweep is the movement of the first move and a half of the form.
At first Dan at my school students can start doing takedowns in sparring, and that trap/inside sweep is one of the first they learn.
A non Sport Example would be the knife hands in the first part of this demo, in forms the stance is off, but the 45 degree movements correlate to stepping out to avoid the punch and angling yourself properly. The strike, waist, and other mechanics are the same. In styles that dont do deep stances, like okinawan karates, this looks nearly identical in practice as it does in forms.
Finally, Machida.
Now, Im not used to his forms whatsoever, so I can only give the obvious examples without having a partner to tinker with. The nuances and timing are just so different, that youd need a Karate guy to break it down better
At the end of form one, he does the kick, myriad of straight punches combo he does in the cage all the time.
Also in form one theres a side kick (hand out is probably supposed to check or catch the wrist but not overly necessary) into moving in while the opponent is hit and off balance to throw the elbow. When practicing this with an opponent, you slide in for the elbow (if thats your preferred striker) immediately, but the main technique would be the same.
As for the second form, the only thing I could see off the top of my head is a high block (which will never go as high on an actual opponent, but the mechanic is the same), into the double palm strike. The high one could either break the nose or aim for the button on the chin.
Just for kicks, heres a Machida highlight vid becuase Karate or not hes awesome to watch strike
You can actually see leg tie takedown similar to how a front stance in forms teaches it mat about 1:40, he goes to step in a similar way you would were you doing it outside of forms.
And here is a clip of that punch/kick combination from kata 1 in sparring. It gets interrupted as his opponent tries to clinch and breakaway, but you can still see the combo.
Essentially these are all things one could learn without forms, but forms can help in this process and can be a good way to getting the hang of these things if youre training the bunkai properly enough.
As for Karate guys disagreeing with, Im sure some would.
I know there are combos Ive taken out of context from forms, i.e. samdan has a spear hand into a spinning backfist. I drilled as bunkai intially with someone out to break my nose, then was able to use it on the MMA guys I work with no issue.
But, they learned that combo without ever doing a kata.
so (at least from a technique standpoint) i just believe if Free Sparring was different, there would be no need to train bunkai separately. I mean maybe when youre first tinkering with a bunkai, but not to the degree many of us need to now.
But hey, thats just my opinion. As long as you're drilling full speed, proper distance, and good contact they have the same effect