This restaurant is probably the best I have been to in Hiroshima since moving here. Not for it's food or for it's convenience but for it's overall atmosphere. Renting a private room is always the best idea and to do this you will have to book up front. For families with infants which require a place to lay down and a place to change their "dirties", I really wouldn't recommend it as there are no facilities for this. Disabled people may also find it difficult to use the bathroom utilities here.
As for the food, if you stick to the fish based or shell fish based menu items then you can't go wrong. They serve some of the best fish dishes around. I have heard that the meat dishes aren't great but I have never tried them myself.
The prices are moderate, ranging from 980 yen upward to over 2000 yen. On average you will pay around 1500 yen per person for food and around 300 yen per person for drinks. There are lower priced, more varied and westernized dishes for children and adults too.
A family of 4 with 2 children can expect to pay a total of around 8000 yen (90$ US) , all included. They accept international/Domestic credit cards or Japanese cash.
Over all , the staff are well mannered and professional, the food is great and the experience is well worth the extra cost. A great time for any tourist looking for an authentic Japanese atmosphere with authentic Japanese food.