(Reposting my best post from /mu/)

Okay, Mariko Fuji (picrel), Akina's underage bf cheated on her with this absolute milf 10 years his senior:
https://www.youtube.com/watch?v=ZCbo313eqp4

Here's Akina's hidden gem by Haruomi Hosono (the man who invented Japanese music):
https://www.youtube.com/watch?v=Czgm6OcaUBo

And this is Miharu Koshi, Haruomi Hosono's bitch, she's kind of important because she writes her own songs:
https://www.youtube.com/watch?v=U82gj2ZZgmg

Honorable mentions:
Yuko Tomita:
https://www.youtube.com/watch?v=GzFjOZjp3Jk

Mami Ayukawa, she used to race cars:
https://www.youtube.com/watch?v=jgfV0FqZtoE

Junko Mihara, blends NWOBHM and city pop, she also used to race:
https://www.youtube.com/watch?v=9WtMS0a22lg

Kaoru Sudo:
https://www.youtube.com/watch?v=fI7WnAbmMqw