The first J-Rock song I heard was "Howling" by abingdon boys school. I heard this song as the opening theme for an anime called Darker Than Black. I'm really not much of an anime fan, but I do happen to really enjoy this one (except season two, which is dead to me). But... well, this is what I saw (and heard):
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Day 11: The very first J-Rock song you ever heard
Day 12: Your favourite J-Rock singer.
Day 13: Your favourite J-Rock drummer.
Day 14: Your favourite J-Rock guitarist.
Day 15: Your favourite J-Rock bassist.
Day 16: Your favorite J-Rock lyric (and a translation).
Day 17: Your ultimate J-Rock idol.
Day 18: Your favourite J-Rock cover song.
Day 19: Best live J-Rock group.
Day 20: Your favorite picture of your J-Rock idol.
Day 21: Your favourite piece of J-Rock merchendise.
Day 22: Your favorite picture of your favorite J-Rock group.
Day 23: Your favourite J-Rock tour.
Day 24: A J-Rock song that makes you happy.
Day 25: A J-Rock group that you have seen live.
Day 26: Your favourite interview with a J-Rock group.
Day 27: A J-Rock member that you would like to meet.
Day 28: A J-Rock group you wish would get back together.
Day 29: A J-Rock song you never get tired of.
Day 30: Your favourite J-Rock album.