Tokyo food recommendations, anyone?

[randomness]

My previous requests for pointers to food turned out very well, so I'm going to try it again. Any suggestions for Tokyo? I'd prefer places that don't break the bank (i.e., I'm not really interested in spending Y5000 on lunch, however good it is, sorry.).

Thanks in advance!

BTW, (tafkar) I got to Bill's! Thanks, that was great! Of course they'll be getting a write-up. And thanks to all the rest of you who suggested places which I didn't manage to get to...