Community counterplay
Counterplay note
When you read Jack's lows, low parry instead of crouch-block punishing. Many key lows are only lightly punishable or have awkward extensions.
Source: YouTube: 1 Tip against EVERY Character in Tekken 8
These notes are public community matchup references. Verify punish and sidestep details after Tekken 8 patches.
Related answers
As Yoshimitsu against Jack-8, step the sequence against FC.df+3+4*,uf+1+2 (Make Some Noise), then punish with FF3 kincho B2 1.
Source: YouTube: All Strings you can Sidestep against Jack 8
As Yoshimitsu against Jack-8, step the sequence against FC.df+3+4*,uf+1+2 (Make Some Noise), then punish with FF3 kincho B2 1.
Source: YouTube: All Strings you can Sidestep against Jack 8
As Yoshimitsu against Jack-8, step the sequence against f,F+1+2,2 (Cross Cut Blast), then punish with kincho B2 1.
Source: YouTube: All Strings you can Sidestep against Jack 8
As Yoshimitsu against Jack-8, punish f,F+1+2,1+2 (High and Low Cross Cut) with WS21.
Source: YouTube: Yoshimitsu Full Punishment Guide against Jack 8
As Yoshimitsu against Jack-8, punish f,F+4 (Rocket Kick) with 11.
Source: YouTube: Yoshimitsu Full Punishment Guide against Jack 8