Yes, the menu identifies which items are gluten free. (Note to others who answered this question: avoiding dumplings and ramen isn't necessarily sufficient if you're actually celiac -- for example soy sauce contains potentially harmful amounts of wheat.)
Yes. Apart from dumplings and ramen, it's all vegetables and rice.
Definitely. The only thing I can think of besides the dumplings and ramen that might not be gluten free is the tempura. You'll have to ask. But you shouldn't have a problem
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