Kaiten-zushi.
Every week I probably get at least one instance where I crave kaiten sushi. I mean, I crave sushi in general, but kaiten is the way to go when you're an exchange student on a budget with no source of income. Yes.
It's just so cheap, compared to actual sushi bars or restaurants. 2 pieces of sushi, with big pieces of fish on top for 130 yen. Better fish = more expensive of course. But you never go for those, duh.
I usually go to the place I blogged about before. After class with a couple of friends - it's a no-brainer. But I discovered this new place right around the corner that looked like it had more seats, more selection, and bigger variation in prices from 85 yen to 300.