Ada, I'm not on Atkins so this doesn't directly respond to your question, but wanted to second what someone else said here - the portion sizes if you're eating Japanese food are generally small. I was not on a diet per se when we were there, but just took care not to stuff myself unnecessarily. I didn't deny myself anything, snacks, sweets, whatever, I just made sure I didn't over-order. Since the portion sizes are small, I found I ended up eating less, generally, and actually lost a little bit of weight while I was there. Had the added benefit that when we came back to the US, I think my stomach shrank and I found I didn't need to eat as much.