Stuff I found recently:
Janus No Kagami TV Drama OP from 1985-1986. (Yanusu no kagami)
It features Megumi Shiina's "Konya Wa Angel" (Tonight is what it means to be young) as the theme song.
I was happy to have found this, but then I watched it, and... there's something kind of nightmarish about it. Not scary, just weird and nightmarish. It wasn't until after then that I found out it was based on a horror manga, so that makes more sense now.