Having spent the year in Dublin, I have tried many restaurants s in the city center. One of my favourite was
YO Sushi Clarendon St, City Centre South
This is the cutest restaurant ever! They pay so much attention to detail. All the sushi is made in store and is then sent around the restaurant , for customers to choose what they want. Prices are indicated by the colour dish the food is served in. This can allow you too choose how much you wish to spend.
This is not an image from the Dublin restaurant , but it gives the general idea.