OK to eat sushi when dieting?

Typically anything full of grains will increase your carbohydrate and caloric intake especially processed and refined carbohydrates; bread, rice, pasta are the typical three. Keep your diet mostly in meats, vegetables, and fruits more on vegetables and meats then fruits and your 1200 cal a day diet should be great. Don't base your diet too much on caloric intake rather the ratio between fats, proteins, and carbs because your body adjusts to caloric intake quite easily. In the beginning you may see a difference in your bodyweight but it will come to a stand still because of your bodies adaptive mechanisms. Then when you accidently creep over the adjusted 1200 caloric intake your body has, you will bloat up like a balloon :-(.

I would say yes, it is very OK to eat sushi. Sushi is quite low in calories, with the exception of the ones with cream cheese, that raises it a bit. If you are counting calories, just check the package if it has nutrition info on it. Some shops put it on their packages, others don't. If they don't, read the ounces on it, go online and goodle calories in... insert the kind of sushi role you want. You should get lots of helpful sites. You'll just need to do a little calculating to get the calories per ounce, multiply by the ounces in your package. It won't be exact, but close enough to not through your diet off.

avoid the rice and sauces, and you should be good. shashimi is a great source of protein and nutrients.