YuriChan, thanks for the recommendations! I'm familiar with B'z from 2000 onwards, but I'd like to explore their 80s and 90s work. Any particular songs or albums you'd recommend?

I'll also give Koshi's music a whirl. Also, I've always wanted to get into Seiko Matsuda, but I don't know where to start? She has such a huge discography! Any favorites?
I'm familiar with Akina Nakamori, Mai Kuraki, Tomomi Kahala, globe, and Namie Amuro, but miwa and YU-A sound promising!
emi, ah, some unfamiliar artists! Thanks for those

Funny how MAA and EA have similar names. I'll look them up. With ikinmonogakari, though, what's a good place to start? I only know Arigatou
Oh, and I love supercar, too! And Miki Furukawa's solo work.
RayJason, thanks! I do like Play, although I'm particularly fond of Namie's earlier stuff. Say the Word remains my favorite