My current favourites are:
Younha - Yubikiri 'XD', aiaigasa, my lover, omoide nekinai
YUI - Tokyo, Tomorrow's way, Feel my soul, Life
Ai Otsuka - Cherish, Sensu, 5:09am
Exile - Choo Choo train, song for you
Mink - One,wish
Yui Makino - Amrita
Nami Tamaki - Promised Land, real dream, naked, Shining star
SAYAKA - Garden, eversince, mermaid
Rie Fu - 2cm, decay, beautiful words
give it a try~~