INFJ Forum - The Protectors
Life is Like a Boat - Rie Fu (Bleach anime ending 1)
Kimi no kioku - mao (Hakuouki anime ending)
Two from Touhou:
Moonsong - Cave Story (in-game music)
I got my first exposure to J-pop through anime on youtube, which a friend liked. The songs and music can be inspirational and fun...