Hiya,
One of my friends speaks Japanese and she had a look on the website for me. Tickets are around £50 and you can collect them from special ticket machines once you get to Japan.
I'm still quite keen on going - am just waiting to hear back re: standing/seated tickets. Will keep you updated.
I'm not going... going to be at the other end of the country on that date now, and it seems a little extreme to change my plans to see a band that I can more than likely catch in the uk.
Kinda wish I was, though!
Have fun guys :)
Rebecca