how about Sakae Sushi ??
ii's quiite cheap .. ii thiink

+ ii dun't thiink you'll need to spend 20 - 30 bucks there unless you really splurge on the food
8 bucks can get you a gud terriyaki don whiich iis satiisfyiing enuf unless your appetiites biig. most of the food's below 20 bucks and there filling enuf 2
there's oso the sushi rolliing around :- umm the normal colored plates are 2 bucks each, the red plates are 8 bucks -- fiigure

theres oso the sushi buffet where the colored plates are free and the red plates are 6 bucks each --- 14 bucks for student and 17 bucks for adult -- not so sure about adult tho

picky picky picky ...