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On the fifth day of the fifth month the Japanese celebrate Children’s Day, or Kodomo no hi. This ancient celebration goes back some 1400 years, although it was originally only a celebration for boys. (Girls have their own day on March 3.)
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As the 5th of May approaches, giant colorful carp flags (koinobori) are hung alongside riverbanks to prepare for the occasion. Some homes also fly their own carps, with each fish representing a member of their family. As the carps blow wildly in the wind, they symbolize strength and good health.
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On this day, it is traditional to eat Kashiwa-mochi – you’ll find them sold everywhere. The snack is comprised of a sticky rice cake with a sweet bean filling. Usually it is wrapped in a non-edible oak leaf.