Hello, I think you are in the right section, but I think you might need to wait a little longer for a response. In any case, you are going to have to go and see for yourself. Aiki jujutsu is a very general name, like aikido (which is the art I practice). I know the art of aikido, the name of the founder and the history, but there are many different types and this partly depends on the political aspects of the art's development. I also know that Ueshiba was a student of Sokaku Takeda, who founded Daito-ryu Aiki-jujutsu. However, the only expert I know is Kondo Katsuyuki. Perhaps someone else can enlighten you further.
Best wishes,
Peter Goldsbury,
Forum Administrator,
Hiroshima, Japan