Can you recommend a couple of good Japanese rock bands?

As a huge fan of rock, i wanted to discover rock from the Asian roots! So if any of you guys can recommend some GOOD, japanese rock groups please do so.I'm looking for anything that is classic rock, punk rock, alt.rock, or anything that is not related to the likes of metal. Preferably nothing too "pop" liked, but pop punk is fine(if this confuses you...i mean nothing that is "Jpop" or anything categorized under that or anything that is not too "preppy" or "makes you want to dance" or any rapping in it)I only have one japanese rock band that i already know which is x japan. So if any of you guys can recommend a couple of the best-or popular-japanese rock groups that would be nice.Or if you can't really think of any, Asian rock groups in general would be fine.