Community counterplay
Punish note
As Yoshimitsu against Jack-8, punish u+1+2 (Patriot Fist) with DF4.
Source: YouTube: Yoshimitsu Full Punishment Guide against Jack 8
These notes are public community matchup references. Verify details after Tekken 8 patches.
Related answers
As Yoshimitsu against Jack-8, sidestep or sidewalk either direction against 2,1,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, sidestep left against df+1,1 (Overheat), then punish with ss2.
Source: YouTube: All Strings you can Sidestep against Jack 8
As Yoshimitsu against Jack-8, sidestep or sidewalk either direction against 2, then punish with 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, step the sequence against FC.df+2,1,2 (Swing R Knuckle), then punish with ss2.
Source: YouTube: All Strings you can Sidestep against Jack 8