The core of it involves —specifically, the original Yamamoto soundtrack, which was later replaced.

Here’s the breakdown of the story:

That is an interesting story, because the "Japanese Internet Archive" angle touches on a major piece of anime preservation history.

If you want to check current status: search archive.org for "Dragon Ball Z" "TV ver." "Japanese audio" and look for items uploaded before 2023. Many still exist, but they're hidden behind "Item cannot be previewed" warnings—though the files remain downloadable.