i love the show at teppenyaki. the food is not the tastiest hibatchi i've ever had though.
i've never eaten at nine dragons, but have avoided it since i once worked with a woman who was a chef there, and said they put loads of msg in everything....ick, not for me.
i like mickeyfan1's idea - the sushi bar in japan is fantastic, and they have incredible drinks, plus a great view of epcot. or if you're not into sushi, the counter service in japan is quite good, and you can sit in the lovely rock garden area while eating.