They have several vegan rolls - mushroom, asparagus, and veggie tempura. You can also get fried tofu in the bento boxes. I believe the miso soup is vegan, but you should double check.
Avocado roll is vegan also. I usually get avocado rolls and vegetable tempura. You could probably ask them to modify a roll for veggies you like if you want more choices they've added mango to an avacado roll for me.
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