Kazumi counterplay

Neutral

Kazumi's main plan is to get up close and use her 1,1,2 and CH 4 to get big damage against counter attacks. Because of their speed, attacking into her without a frame advantage can be scary.

If you try and defend instead, you need a plan for dealing with her pokes. Backdashing rarely works because her jabs and d/f+1 all have huge forward momentum. This effectively allows her to spam 1 at you forever with the only real counterplay being high crushing moves.

However, outside of the 1 jab, all her moves are -3 or worse on block. If she's spamming attacks after d/f+1 or jab strings, then any i12 or faster move will win, so just counter hit her. Reacting to blocking 1,1 or 1,2 instead of 1 is essential so that you can take your turn effectively.

Because of this, the more common Kazumi flowchart is 1,1 or 1,2 or d/f+1 into sidestep block. The mind game then is that your fastest homing move is probably i15 or slower, at which point 4 becomes a threat again.

Sidestepping

After blocking Kazumi's jab (+1):

Sidestep right beats 1, 4, d/f+1, u/f+4, and f,F+4.
Sidewalk right beats 1,1 and 1,2. On some characters sidestep right also beats these.
Sidestep left can beat 1,1 and even sometimes 1,2. However, depending on the character this is rather fickle, and a step block usually won't evade the second hit.
Sidewalk left beats d/f+4. It's common to use this move as her “homing” mid in this situation.

Tiger

If a string ends with a tiger, the tiger only comes out on hit, and the move is punishable on block. Can be awkward to can get the timing for punishing some of them. These moves are:

ws3
u/f+2
1+2
b,f+2,1,1+2
f,F+2
d+1,2

Strings

3,2 and 3,1 – duck launch the high
ws4,4 – duck the high
d/b+2,3,4 – all -14 lows. Very delayable. First hit is reactable. Third hit can be interrupted by i11 on block. Any counter hit guarantees the next hit. Can't low parry after being hit.