Recently, I witnessed different initial footwork and arm movements in ushiro ryotedori
My first exposure to ushiro ryotedori can be seen in Yamada Sensei's demonstration here (technique starts at 4:40)
Ushiro ryotedori kotegaeshi 1
(Note how both hands come up as Yamada Sensei steps out)
If I understand correctly, the double hand lift is mainly to off-balance uke by making him overextend forward
Then, I've also seen the following:
Ushiro tekubi tori kotagaeshi
(Note how one hand comes up while the other stays at tori's hips)
The second method appears to rely more on using body movement to swing uke to the side, and extending the hand on the forward leg to escape on the other side. It seems to extend the idea of tenchi nage, where uke's energy is split before tori steps out of the grip.
This second method also seems quite popular, but I *am curious* who started this style of movement, as it does not appear in the usual texts
Would also be really interested to hear everyone's views and experience on different ways of moving and getting out of ushiro ryotedori or tekubutori