Teharu is a great place to go if you want some inexpensive sushi. It is conveyer belt style with lots of options to choose from. That being said, there are some guidelines that I recommend following to ensure you get fresh sushi.
#1-anything fried, which should be hot, you should definitely order fresh... unless you actually see them put a new line of plates out on the conveyer belt. You can do this by asking one of the waiters/waitresses, or the cooks behind the counter.
#2- don't grab the last of anything. To me, that means it has gone around a few too many times. Again, if you saw them put it out, the rule doesn't apply.
#3- go during a busy time of day. Yes, you'll probably have to wait a little bit for a seat. But the sushi is being turned over faster.
#4- there's a secret menu! I recommend the volcano roll. Careful though, it comes out hot!
No, this is not my FAVORITE sushi place out there, because the quality isn't the highest. But when I want to get my sushi fix on a dime, this is the place I go.