Originally Posted by: FJT 
It's totally gluten-free, Rinshin. The smallest bit of gluten (so not just wheat, rye and barley too) makes me sick for days. I can't have normal breads or noodles (rice noodles are fine) and a lot of sauces and seasonings include wheat including soy sauce (wheat-free tamari is fine).
Perhaps Rinshin could translate for you, "I am allergic to gluten. I cannot have any wheat, barley (whatever else you think you should list). Please guide me to good menu choices." into Japanese, and you could print it out on a card you could show to your server.
Traveling in Mexico, Central and South America with a friend, we did this for him. He isn't allergic, but has a major intollerance to peppers. Anything more than a very small amount and he becomes violently nauseous. I can relate, because I get violent intestinal distress from galangal, but curiously not ginger, which is in the same family. Perversely, I love galangal! Every few years I suffer through a serving of Beef with Galangal from my favorite Thai restaurant.