Very nice. It seems the owners need extra staff for their busier times. 30min is way too long. The 2hr table limit is becoming more common in Japan believe it or not. Not everywhere, but you'd be surprised how often you do run into it.
I had maguro from Ireland a few months back and it was fantastic. We thought it was really odd that we were eating maguro from Ireland in Japan, but it was very good quality.
Actually I never thought about where the fish is from. The thinking is that if it's from a good Japanese restaurant, then it must be good!
The time limit thing is really annoying, takes the joy out of eating. I mean I don't mind if it's fast foodstuff or cheapy quick in quick out places. But normally you'd like to sit and eat and chat over dinner and enjoy the whole experience if you're going to a decent place. Too bad it's become more popular, even in Japan now.