I'm traveling to Japan in February and I'm wondering if any fellow J-rock fans have suggestions on things to do. I've got friends who have been before, but none of them are interested in J-rock, so I don't have any good ideas of what to do while I'm there.  Are there any j-rock landmarks, cool j-rock stores or bars to check out? I'm open to just about anything. I'd really love to see a concert, but I know not many bands play in the Winter. Any suggestions related to Nagoya Kei style stuff wo