Originally Posted by LapLap

Been taking LapChild to a range of restaurants in Japan since she was two and a half. Never had a problem. We discovered early on as a result of these visits her love of salmon eggs and good sea urchin. If you don't go, you won't know. Worst case scenario if your kid is an incorrigible fusspot would be asking for a bowl of plain rice. Take an iPad (or some other electronic or dependable pacifier) so you have a chance to eat.
From my experience, much of the advice you're seeing here is useless. The spread I linked to is from the Century Hotel Matsushima. Not as extensive as other restaurant buffets but less options here meant higher quality.
Not all nori is equal, there are some nasty sheets sold abroad. Once you can get hold of the good stuff,you could try crumbling it onto popcorn (we like it with a little salt and a vague drizzle of honey) or find nori flavoured potato chips. Your kid might get a taste for it after all.