Yama is located within the array of attractions in Concord; from the mall to the speedway. It is easy to overlook as it is often overshadowed by major chain restaurants.
I have been to the restaurant a few times for lunch and have had their sushi and hibachi. The hibachi is average. I've had better. Additionally, don't expect the excitement of having your food cooked in front of you, as I don't believe they have table-side grills. However, the restaurant is clean and inviting.
The sushi is good.. average. I don't know that I would come here without the company of my coworkers, as they seem to really enjoy it.