Yamazaki’s most damaging CCs revolve around his roll for advancing:
Basic
c.forward, c.roundhouse, close s.fierce-roll, [c.fierce-roll to corner], c.fierce, whiff c.short/c.jab, j.fierces, qctx2+P
Advanced
c.forward, c.roundhouse, DP+jab, DP+strong-roll, close s.fierce, DP+strong-roll, [c.fierce-roll to corner], c.fierce, whiff c.short/c.jab, j.fierces, qctx2+P
The basic one only works from point blank range. From further away, either use the Advanced combo or replace the first close s.fierce (after the c.roundhouse) with a c.fierce-roll.
For pure style, try this combo -
c.forward, close s.fierce, DP+jab x3, DP+fierce (one hit), DP+jab, DP+fierce (one hit) till meter is out, hcbx2+P
Since the opponent is grounded the whole time you can use the Drill super… it only does 80 damage points less than the other super. After about 5 DP+fierce knives you can actually mash on s.jab, then go to s.fierce into more fierce knives to do damage through hit count, but the timing on it is kinda iffy. In much the same way, you can do s.fierce repeatedly. After a while you’re pushed too far away so you can do fierce knives to get close, but the timing is extremely strict. Near the corner you can just sweep and do a couple of knives to get in closer, but the damage is less than the Advanced combo anyway.