Its hard to find a nice teppan restaurant that serves great sushi in irvine. Koki is one of those retaurant. Koki serves good teppan and awesome sushi. Their teppan chef are well trained and their waiter and waitresses are polite. They have different variety of sushi and are always fresh. The only cons about this restaurant is that their dinner menu can be kind of pricey. Other than that, its worth a visit.