Go no kata video
Info about "Go no kata video"
The Kodokan Go no Kata is set of exercises developed in 1887. The Kodokan preserved the techniques of this kata from early jujutsu training methods. Originally this kata was called the GoJu no Kata (the form of strength and flexibility), however the research into the kata was inadequate and the developers were not pleased with the 10 techniques devised. So the kata was left as it was in order to think it over.
This kata is now considered a “lost” kata of Judo because it is not a part of the official Kodokan syllabus and it is seldom taught or practiced today. The techniques of this kata demonstrate the appropriate use of strength, power, and hardness (go) as a counterbalance to the principle of yielding (ju).
Jigoro Kano believed that there are times when it’s appropriate to yield, and there are times when it’s not appropriate to yield. The theory of Judo is to apply the correct amount of force necessary to accomplish the objective. The most efficient use of strength and power is the core principle of Judo as created by Jigoro Kano. Using power efficiently includes standing firm, resisting, and opposing force with force in certain conditions. This kata is designed to clearly show that yielding is not the only tool available to a judoka.
[From Judoinfo.com. Original page is here]