By the by more detail on the Koshiki no Kata can be found here
and in even more detail here
. An Aikidoist reading the latter will see a lot that is familiar - the concept of Aiki, oneness with the Universe, very esoteric. Those that are into the Chinese connection to Japanese martial arts will find something also.
Since it is meant to be practiced in full armor you wont see much of the dogi grabbing found in Judo randori - in fact it looks like Aikido. This was the kata my student was watching that Kano demonstrated (see my posts above).
I personally find this kata seriously cool.