As a tried & true Iron Chef fan myself (we even got engaged at restaurant Morimoto (read all about it here)), I have seen the Natto Battle several times. My sister-in-law is Japanese, and happened to have some Natto on hand when we were at her house one night. It is truly an aquired taste, reminding me in some ways of strong bleu cheese, but with a nutty flavor. And the threads. Phew. Those threads are EVERYWHERE! It's an interesting flavor. I'm glad I tasted it, but I will report that I have not had any since then!