This thought is something that has been bouncing around in my head for some time. It came to surface again, triggered by a thread on a Yoshinkan board.

The thread described a seminar by a senior teacher who demonstrated a technique where atleast 2 uke picked him up. He then began to project his ki downward ("made himself heavy" as I call it). The uke could no longer hold him up and fell themselves. As was discussed in that thread, this type of thing is not generally taught in Yoshinkan.

It does appear to be something carried over from Daito Ryu. I have seen Okamoto Sensei do similar things in his DVD.

This is generally described as being a "secret technique". Which is something that will be taght only to very advanced seniors who have been training for a very long tim.

I haven't tried this exact technique yet, but I will soon. I think that with only 2 uke I can probably make it work based on things that I learned in Taichi.

My thought is that, in a number of cases, the "secret techniques" and "advanced principles" of Aikido and Daito Ryu such as this, are often found in the more fundamental teachings of Taichi.

Which makes me wonder why some still use the term "secret technique". It's not a very goo dsecrete if it's the foundation of an art that millions of people outside of your school are practicing.