I assure you that this is not a "what not to do" demonstration. Could you post a link to a video which demonstrates the first suburi as you believe it should be done?
I dunno what that is. The topic of the thread is how to do a shomen cut for suburi.
I'm having trouble parsing Saito Sensei's body organization during his cuts in this video. It looks like he is tensing his shoulders and arms at the end of his cut.
If he is, then I need to figure out why that is not terrible. If he is not, then I need to figure out what he is doing that makes him look like he is tensing his shoulders.