Seisan Bankai is performed at the shodan test and at every test thereafter. Basics should be behind the seisan bankai student, and excellent form, focus, strength, realism and timing are essential. In general one student will proceded through the kata to moves that will be applied, turn to his or her partner, use the move to defeat an attack, then return to the kata, repeating the move and moving on. At UVA the bankai is performed with the attacker intially on the defender's left.
Students bow to the judges, then to each other, then the defender bows again and begins seisan kata.
This is a close-in technique. Either perform the minimal block required for strong ridgehands or consider a offbalancing downward yank as the attacker reaches for your throat. Both elements help. Two punches with attacker retreating in between them. Knee Strike defeats grab for throat.