Fuck, even as someone who knows sparkle Z, i never made that connection. I can't unsee it now. PS: I am still so mad that most of the yatsurugi damashi shows don't have their OPs up on streaming services.
ikr, i was only ever able to listen to yatsurugi 4 and 5's banger of a full op 1 time before it got removed from youtube and has never been reuploaded. it may be worth sending them a message via the english yatsurugi website and see if anything happens, they do respond fairly quickly from when i sent them a question a while ago.