Gluten-free review:
I went here for a birthday with 10ish people. The food was great and there were a lot of gluten-free options. I had the sashimi, yam fries, sliced potatoes with cod roe sauce, tako wasabi, and oysters. The house sake is good too, especially warmed up. For dessert they have a number of different ice creams and a gluten-free double chocolate godiva cheesecake. OMG!
For larger groups they put everyone's bill on the same receipt so make sure you bring cash. But you can pay for your potion with credit/debit too.
Note that I have a moderate intolerance so if you have celiac's disease I don't know what the cross-contamination is like here. I did not have a reaction to any of the food though.