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taiyaki, fish-shaped cake
A Japanese street food made from batter cooked in a fish-shaped (specifically sea bream) mold, typically filled with sweet red bean paste. Other common fillings include custard, chocolate, and cheese.
Kanji: 鯛 means sea bream, 焼き means grilled/baked. The name comes from the fish shape of the mold.
Cultural notes: A popular street food and festival snack. The classic filling is 餡子 (sweet red bean paste), but modern variations include custard cream, chocolate, cheese, and savory fillings. There is a long-running debate about whether to eat from the head or the tail first.