I have eaten at 9 style sushi for several years. I have gotten glutened before, but it was a long time ago. Once I explained about gluten free, they were extra careful. Because I have been going so long, I know what is gluten free and what is not. I usually get a veggie roll, tuna rolls, yellow tail rolls, or the Tracy salmon lemon roll (which I modified so many times, they gave it a name in their system. It's not on the menu, but you can ask for it. It's tuna and salmon instead of the crab, and no onion, I think, which was just preference for me.)
— Somewhat
— No gluten-free information on the menu
— Some
— Excellent
We ate gluten free there but it was not easy. The waiter had to go back and forth and didn't really know for sure. Probably wouldn't go back but it wasn't horrible.
No
No gluten free soy sauce :-(
No
No
Knowledgable staff, GF soy sauce.