This type of snack is called monaka: a traditional Japanese confectionery that comprises thin wafers made from mochi (rice cake) with filling inside them, which is usually a red bean paste. This product is reminiscent of taiyaki (bream-shaped pancake) in terms of appearance.
This taiyaki snack has a filling of soft and tasty bubble chocolate and it is sandwiched with a light and crispy fish-shaped wafer. It also contains calcium, so it is a good choice for growing children.
Although it is a very rare case, some sea bream wafers have a heart-shaped fin or scale, and the person who gets it is considered to be lucky. Test your fortune!