After countering Kaiser's first punch with a right jab and then buffering a left hook, your next right jab which Kaiser is supposed to dodge needs to be delayed by at least 1 frame. The other dodged right jab does not need to be delayed.

Made a showcasing video :)

In P1, after countering his taunt with a left jab, do a delayed buffer which is jab>duck>star.

In P2, after the recenter hook, buffer 2 hooks>duck>star. Even top runners use this one because it only wastes a single frame. The buffer does not work in phase 3.