It is in the name. "Sushi Bar". Zipang has some of the best sashimi & sushi this side of Vancouver & Toronto.
This is a traditional sushi restaurant, not a fusion place, not an izakaya. They have a large variety of fresh raw fish and that is what they are good at.
Please do not go to Zipang for tempura, donburi or other "normal" Japanese cooked dishes. It is the equivalent of going to a steak house and complaining that the chicken salad isn't good.
If you are willing to be a bit more adventurous, there are some less well known cooked dishes that are pretty good. The cold soba noodles are good, they have some grilled fish (i.e. mackerel) that are tasty and the daily specials all are a little off the beaten track for Calgary Japanese food.
The highlight for me (and many other patrons at zipang) has to be the heads on shrimp sushi. This is one of the few places in Alberta that I have found that serves fresh shrimp sushi with good flavor. To top it all off, the kitchen will take the left over heads and deep fry them to make a delicious dessert (think Asian shrimp chips).
The price is a little steep but considering that almost the entire restaurant was filled with Japanese families it appears that there are some people in Calgary who appreciate what Zipang is offering.