There's far more than that gone, Ars Almal's Gregorio cover is one I personally confirmed has been privated and isn't on this list. Niji is nuking all attempts to make comprehensive lists of what's gone from the JP side, so it's incredibly difficult to find a real list of what's gone. With that said, there are some safe bets going off of what YAB had posted about on his personal twitter:
-He handled the mixing for a good amount of Niji's 3D lives, and the list mentions that those have been privated:
-He specialized in orchestral mixing and recording (Gregorio involves orchestral backing tracks, for example)
-He has done work on voice packs before. I don't know if anyone here has checked if that stuff has been removed from the store or not, I know I haven't gotten around to it, but here's proof of at least one:
View attachment 77361
-According to YAB's own post (full disclosure, I grabbed this screenshot from 2ch) he's worked on at least 350 or more individual mixing projects for Anycolor, 400+ including 3D lives.
So we're looking for voice packs, music with orchestral mixing, and live music/3D debuts, and expecting 400+ takedowns. God only knows if we'll ever know everything that got removed, I highly doubt any of it is coming back.