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.
I think somethings lost in translation there. The mind and body coordination principles he did get from shin shin toitsu do. His Aikido principles based on those then he created. Two different things.