There is debate among judo scholars as to why Kano included kata in Judo. Some even go so far as to say he did it to make sure the koryu jujutsu ryu would buy into Judo as the “modernized” ju jutsu, as kata was their most common way of training.
The most common take is that the randori no kata, (Nage No Kata and Katame no Kata) are training methods, just as is randori. Typically, what is advocated is kata is maybe 25% of one’s Judo training regime. So kata is not THE MAJOR method of Judo training. If you look around enough, you will see that Kano himself said that. I think that will show where Kano stood on the issue.
Other kata, like Ju No Kata and Itsutsu no Kata, are considered to be “principle” kata, that illustrate higher principles of Judo. Kano himself created Ju No Kata. I’m sure most of you guys would consider it pretty useless to practice it to learn how to fight, but as Dsimon suggested, if you are at a certain level in Judo, and practice Ju No Kata, things jump out at you. I’ve had aha! moments and I’ve only done Ju No Kata a couple of times, and not all of it at that.
Itsutsu no Kata is likely an Tenjin Shin’yo Ryu kata that Kano learned when studying that art. I won’t try to explain it, as I have no idea, really.
Kime No Kata is a preservation of older self defense techniques from koryu jujutsu. Koshiki No Kata is the only remaining kata (or apparently anything for that matter) of Kito Ryu, the other primary root koryu of Judo. I don’t know or understand it either. Good for direct fighting applications? Not really, but it does illustrate higher principles of throwing, and is the art from which the throwing of Judo primarily comes.
I’ll stop there. Judo kata have different purposes and origins, from training method and mnemonics for randori waza, to preserving older jujutsu techniques and principles, to illuminating principles at the core of Judo.
It’s more complex than just “kata does not equal sparring so it’s no good for anything”.
Ben


