In single combat, we make as if to cut and shout “Ei!” at the same time to disturb the enemy, then in the wake of our shout we cut with the long sword. We shout after we have cut down the enemy—this is to announce victory. This is called “sen go no koe” (before and after voice). We do not shout simultaneously with flourishing the long sword. We shout during the fight to get into rhythm.
