I am a huge fan of Akina Nakamori ! I find her carrier outstanding and her discography very solid and I don't even speak about her vocal abilities ...
I also like Seiko Matsuda but her discography after the 80's is quite uninteresting and boring at least for me excpet some songs !
I quite like DREAMS COME TRUE too I like the voice of the singer and some of their older songs are very catchy