Hi Bill. I have sushi sometimes. Ketosis isn't my friend anymore - I've had to make peace with higher-carb foods if I want to sleep more than four hours and not be on a ridiculous adrenaline rush 24/7. BUT - I am not diabetic, I'm at a healthy weight, the higher-carb starches don't seem to cause me cravings, and my lipid profile is golden (which may or may not matter, but I'll take it.) If I had experienced neuropathy, I'd be scared sh**less of going off-plan, especially early on.
Rice here and there doesn't seem to bother me. I'm confident that to an extent, I've healed my metabolism.
Is your sushi place one of those all-you-can-eat places? The Japanese restaurants I've been to aren't exactly LC, but you can at least fill up on foods that won't send you into a tailspin. My typical meal would consist of some combination of coconut soup, miso soup, salad, grilled veggies, fried tofu, edamame, chicken skewers, beef skewers, chicken wings, and rice-less hand rolls.
Yes, that's enough carbs to get out of ketosis, but better than going full-on cheat.
Happy Anniversary.
I hope you have a great time and you find something that won't make you feel lousy later.