Hi vince1,
I'll try to help a little bit. The history you heard regarding the late Gozo Shioda (direct student of Aikido's founder Morihei Ueshiba) and the late Takashi Kushida (direct student of Shioda) is pretty much correct. The timing is off a little.
I was fortunate to have attended a few of Kushida-sensei's demonstrations, and sat in on one of his classes while I lived in Ann Arbor, Michigan in the early 1990's, shortly after he parted ways with his teacher's organization. Watching him and comparing his work to films of his teacher, they're very much the same. In my opinion, a credit to early Aikido. I was also fortunate enough to have met some of Kushida's students during my time at Eastern Michigan University when they held classes on campus. FYI, EMU's just a few miles East of Ann Arbor.
Shioda's early Yoshinkai and Kushida's Yoshokai have always used the term "Aikido" to describe their teaching and practice. But as far as their Aikido goes, it could be said to be a bit "hard", with more emphasis on striking and pinning, plus a structured curriculum of techniques that's not common with other branches of Aikido, in my opinion. If you watch films of either of them, it's clearly Aikido. I say "clearly" meaning in contrast to Daito-ryu. There is some really cool crossover happening here with Shioda and Kushida and what Ueshiba learned from his Daito-ryu teacher.
Now we get into nomenclature, naming stuff, and unfortunately marketing and personal interpretation blurs it all. What's worse, is that in the '60's some western publications made a really big deal about the differences between "do" and "jutsu". There is no such polarization in Japan. The Japanese see it as one, the same.
Inside Daito-ryu, there is a catalog of techniques Among them is a set of jujutsu ęč”, aikinojutsu åę°ä¹č”, and aikijutsu åę°ęč”.
Anyone can name their teachings "aiki jiu jitsu". It's a fad, often an attempt to say "we do it harder" than aikido, so be careful.
I'm a student of Hakkoryu, some might call it an offshoot of Daito-ryu, like Aikido. Hakkoryu's founder was happy to call it all "jujutsu" but many of the interesting things are all included.
Hey vince1, spend time with him! Go out of your way to do it. You might have found a gold mine in your own back yard.
Devon Smith