[polka-dot-jewel]

Well, ticket-wise, how much are you willing to spend? And would you rather buy them in Japan or online? The cheapest my ticket has been was 6000yen (C Block, floor), and my most expensive one was 15,000 (J or K block, first upper level). But, I know some people who have spent well over 30,000yen (roughly 300) on a ticket. Those were people who bought theirs online, though. You can definitely find cheaper ones in reseller shops, even close to the concert date.

And trip-wise, how long are you staying in Japan? Where all in Japan do you plan on going? If you go outside of Tokyo / Kanagawa / Chiba, you'll have to look up rail tickets, but you may want to invest in a Rail Pass (again, depending on where you're going). Plus you have to factor in accommodation. (Hostels are normally the cheapest, but the guesthouse I stayed at, the YADOYA Guesthouse, was the cheapest in Tokyo.)