Jyuwaza=Kakari geiko in Shodokan parlance.
Two attacker Jyuwaza would be Ni nin dori
Three "" "" "" "" San nin dori
and so on.
Larry I don't think I've ever tried multiple attacker randori in the Shodokan sense. It's a scary though - I can barely hold my own one on one.
I enjoy two person hikitate geiko (more resistance than Kakari geiko).
Anyhow - I'm off to Osaka for training.