Shopping for Arashi stuff in Japan

[lieyhel.livejournal.com]

Hi~

I'm gonna be taking a trip to Japan for the first time soon and I really want to do some shopping. I'm wondering where I can get Arashi CDs, both old and new ones (especially the older ones since they're hard to find where I'm from), as well as goods? Like where do you buy movie goods? I kinda want to see if I can still get some Platina Data goods while I'm there, or some concert goods for example.

Can anyone help? Thanks in advance!