You should try BoA's BEST OF SOUL and THE FACE albums + Key of Heart and brand new beat singles.
Hitomi Shimatani - HEART & SYMPHONY and PRIMA ROSA albums + SHINKU and Neva Eva singles.
Namie's BEST FICTION.
Ami Suzuki's FREE FREE, ONE, Like a Love? singles.
OLIVIA's singles: a little pain, WISH singles and Cloudy Dreamer mini album.
Koda's BEST 2nd Session album and the following singles: TABOO, koi no tsubomi, 4 hot wave, Yume no uta/Futari de.
ayaka's Mikazuki, I believe, WHY singles.
Otuska's Rocket Sneaker and Kuroge, nagareboshi.
BONNIE PINK - Ring a Bell
melody. - Finding my road, Love story and Haruka singles.
ERIKA - Taiyou no uta, FREE and Destination Nowhere singles XD I could go on and on. + of course all the Ayu stuff you didn't listen to
