I was wondering if there were any DTR practitioners here that can shed some light on a discussion that's playing out on another forum.

There is some anecdotal evidence to suggest that Morihei Ueshiba may have been in possession of specific knowledge regarding "ki" and "kokyu" development.

I was hoping someone here can shed some light on this. Are there specific ki and kokyu development exercises and techniques in DTR that are "common knowledge" or even "secret" knowledge, that only a select few are/were privy to?

I'm only looking for confirmation as to the source of that knowledge, but any and all information would be useful.

Thanks in advance.