Nagasaki has a variety of unique foods, mainly due to its early trading ties with China and the Portugese Black ships. One is Okinomiyaki (literally everything fried) which has a Hiroshima variation done with noddles rather than a dough. It is delicious and you an make it yourself as in many Okinomiyaki restaurants around town the table doubles as a hot plate. You get tutored and then control the destiny of your meal.