Originally posted by akiy
You might want to take a look at the "jyu nana hon no kata" (17 step kata) that's taught at dojo which teach Tomiki and Jiyushinkan aikido. It's seemed to me that these folks use the kata as a set of building blocks for their aikido.
Not just building blocks although the Junanahon coupled with the Koryu no Kata touches on pretty much all there is in Aikido. By practicing the kata extensively, the idea is you bring all your Aikido to a higher level.
The Junanahon have a kihon version and a tanto version but there are also many official variations based on different attacks and then we get into experimentation and what happens during randori where things become unpredicatable.
The best way to look at the Junanhon is a series of ever increasing circles where you repeatedly return to the center.