Alright, I saw some mixed reviews about Aoyama. Let's get some things sorted out.
1. this place is authentically Japanese owned, and run therefore the food will be similar to that found in JAPAN.
2. if you're use to eating ALL-YOU-CAN-EAT sushi, this place might not be for you, because it's not about quantity here, it's about quality - which is always excellent.
I go to Aoyama when i need to treat myself or on special occasions. I absolutely love this place. They will not serve anything that's not fresh. It's comparable to Japango (on Elizabeth st.), but a tad bit cheaper in price and they also have really delicious cooked foods.
Reservations are highly recommended as it is a small restaurant (can seat maybe 30 people?). I suspect that the circumstances of the small space makes it hard to have more waiters/waitresses working at one time which can lead to slower then average service, but that's a trade-off I accept. The waiters/waitresses are always very welcoming and very pleasant.