We came by here for dinner on a Saturday since we were waiting to catch the 10:00PM showing of the Dark Knight Rises, and Ichiban was right downstairs.
We were seated quickly, as the place wasn't packed, but busy. The table/seats were rather small and uncomfortable, I had no where to put my bag. Service was fairly quick - this place is Korean-run so they had those service buttons that authentic Japanese restaurants may not have.
I ordered the Chirashi (around $15) and my friend ordered the chicken terriyaki and salmon bento box. His dish arrived way earlier than mine, and there was a piece of sushi missing from his Bento box. We advised the waitress and she apologized and said "I didn't eat it!" .. and brought back two more pieces of sushi for him. The amount of rice in the Bento box is less than a fistful - the portions were very small. My chirashi looked really nice when it finally arrived. The rice was a good portion, but the only sashimi that seemed fresh and not defrosted was the salmon. The tuna was very rough and I felt like I was chewing beef tendons. The rice is very vinegary and went well with the salmon. Overall, our meal was really meh.
I wouldn't return to Ichiban, as there's obviously better places to go where the price and quality are more reasonable.