Originally posted by andrew
It should be mentioned that shihonage is an extremely complicated technique, requiring co-ordination and timing that will generally be beyond you for years. At least in cases where you don't have a helpful compliant partner.
However, Ikkyo should be relatively easy to apply on your brother. Or Nikkyo, if you remember to make sure his arm is bent at the elbow.
Interesting. Katatedori shihonage omote kihonwaza is one of the techniques we teach students in their first class....
Addressing the original question: the way I was taught to do katatedori shihonage, the very _last_ thing uke can do is "just let go". It's well and thoroughly trapped and uke is dealing with his balance being oscillated in two directions.