His first battle, in 1994, was against Iron Chef Japanese Rokusaburo Michiba; truffles were the theme ingredient.
In his second battle, in 1998, he faced off against Iron Chef Japanese Koumei Nakamura over tuna.
He also served as an expert commentator on the TV series Ai no epuron (愛のエプロン, 'Apron of Love'), a show where celebrities would attempt to make dishes, do so either successfully or horribly, and be judged on their food.
Hattori appeared as a special guest of one of the judges in the baking contest in Yakitate!!
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