Community counterplay
Sidestep note
As Yoshimitsu against Asuka, sidestep or sidewalk either direction against f,F+2,3 (Yata Kagami), then punish with UF1 Kincho B2 1.
Source: YouTube: All Strings you can Sidestep against Asuka
These notes are public community matchup references. Verify punish and sidestep details after Tekken 8 patches.
Related answers
Against Asuka, watch for a duckable sequence. Duck the high or committed follow-up, then use your reliable while-standing or launch punish.
Source: YouTube: How To Beat Every Character In Tekken 8... The Anti Character Guide
As Yoshimitsu against Asuka, punish b+1+4,4 (Narcissus) with B2 2.
Source: YouTube: Yoshimitsu Full Punishment Guide against Asuka
As Yoshimitsu against Asuka, punish f,F+2,1+2 (Higata no Kagami) with DF1 4.
Source: YouTube: Yoshimitsu Full Punishment Guide against Asuka
As Yoshimitsu against Asuka, punish 1,2,4 (Jab Uppercut > Front Kick) with 1 1.
Source: YouTube: Yoshimitsu Full Punishment Guide against Asuka
As Yoshimitsu against Asuka, punish df+3+4 (Sacred Blade) with WS2 1.
Source: YouTube: Yoshimitsu Full Punishment Guide against Asuka