Koichi Tohei got a lot of his training methods from the Tempukai, and invented the rest as a result of being challenged in Hawaii, as Yoshimitsu Yamada recounts here
. He didn't "get them" from ShinShin Toitsu, though - they were
The consensus seems to be that he took rather little of his training methods from O-Sensei.
Koichi Tohei, Morihei Ueshiba, Kodo Horikawa, Yukiyoshi Sagawa, etc. all demonstrated what were essentially very similiar things. Where are the Tempukai guys demonstrating those things?
Tohei later claimed to have learned little from Ueshiba - but I wonder if that was true, or it was just part of the dance of hurt feelings that went back and forth among the involved parties.
It was my impression that the Tempukai provided the framework through which Tohei understood (as much as he did) Ueshiba's "stuff", not that it provided the "stuff" itself, but opinions will certainly vary.