As I understand it, Inaba was the original source of the KSR influence on aikido, although I think Noguchi Sensei also studied at the KSR (and was one of Sekiya Sensei's teachers). He spent some time studying with Kunii, the then head of KSR, although the KSR these days tend to claim that Inaba missed the point and didn't really understand what he had learnt from Kunii. It would be interesting to speculate how much of the KSR Yamaguchi picked up from Inaba, and how much he worked out for himself...

If one tries to teach Aikido and KSR techniques at the same time one will NOT (cannot) perform the KSR techniques correctly (in so far as "correctness" is defined by members of KSR). The sword techniques and kata taught might share some similarities to KSR, but the key elements (i.e., the very elements that give KSR its unique identity) will either be corrupted or missing altogether. At that point, they no longer are KSR techniques.