The clue’s in the name with teppanyaki: teppan means iron plate and yaki means grilled or griddled. So, it’s food cooked on a hot plate.
Sushi is popular around the world, but that doesn't mean everyone understands what this dish technically is. For starters, sushi does not always mean raw fish. The term sushi actually refers to foods that use a type of rice seasoned with vinegar, not just the rolled rice and seaweed variety.