'Sundome' Stopping The Moment Before

"The best budōka can do sundome (寸止め) at any time. So, I have never injured a training partner so far. We say "Oteyawaraka ni onegaishimasu" before we begin keiko."

Unsui

Quote from a discussion about proper training I had with Unsui Sensei. Sensei went on to explain further how my students should train with a presence of sundome in every technique.