Kodomo No Hi: A Guide To Children’s Day In Japan

No, You Don't Eat These Carps

You might have noticed colorful fish-shaped flags hanging on balconies while going out. That means it's almost Children's Day in Japan!

Things change quickly in Japan and as soon as Hinamatsuri (Girl’s Day) is over, the country starts preparing for Golden Week—and even more specifically, for Children’s Day. You may have noticed some strange fishes swimming in the sky in your neighborhood… Carp-shaped? Red, blue, black? To the untrained eye, it seems like an odd affair—colorful carp-shaped flags hoisted from balconies and ominous-looking samurai armor adorning family living rooms.

That’s right, May 5 in Japan is Children’s Day! And here’s our guide on how to celebrate it like a local.

 

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Kodomo no Hi: back to the origins

May 5 was originally known as Tango no sekku (端午の節句), the Japanese equivalent of the Double Fifth which is a holiday celebrated in many Chinese households around the world. In 1948, the government changed the official name to Children’s Day.

However, even though May 5 is officially known as Children’s Day, most Japanese still consider and celebrate the “double fifth” as Boy’s Day. This seems only fair as Girl’s Day is celebrated on the “double third” (Hinamatsuri)—though Girl’s Day is not an official public holiday. 

 

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How do we celebrate Kodomo no Hi?

Households that have a boy will hoist fierce and colorful carp flags outside their homes, and you can witness the same in various public places across the country. Carps are the symbol of the holiday.

According to an ancient Chinese legend, a mixed school of fish tried to fight their way up a waterfall called “Ryumon” (龍門), or dragon gate. While all the other fish gave up and drifted downstream, the carps persisted, and once inside Dragon Gate, they transformed into dragons. While there are different versions of this age-old tale, the Japanese version ripened into a proverb—koi no taki-nobori, 鯉の滝登り. I’m going to go out on a limb and guess that that folk wisdom was shortened into 鯉のぼり, “koinobori,” the modern name for the famous carp flags.  

The annual Children’s Day Festival at Tokyo Tower oversees hundreds of carp flags in celebration of the holiday.

The black carp, the largest one on the koinobori flag, represents the father and is known as the magoi, 真鯉. The red carp represents the mother (higoi, 緋鯉), and the last carp (often blue) represents the child (traditionally, the son) with an additional carp added for each younger sibling.

the kabuto was the inspiration behind Darth Vader’s helmet and the traditional versions still retain a sense of that menace

The Armor and the Beetle

Families celebrating Kodomo no Hi will also decorate their homes with a samurai armor and a helmet miniatures, representing their wishes to raise strong and powerful boys. The armor (yoroi, 鎧) and helmet (kabuto, ) form the word yoroikabuto, which you will hear often around this time of the year. 

Kodomo No Hi: A Guide To Children’s Day In Japan

Those of you studying Japanese may find a useful mnemonic in the word for the helmet—kabuto—which sounds an awful lot like the kabutomushi (Japanese stag beetle) and in my eyes bears more than a passing resemblance. The kabuto was the inspiration behind Darth Vader’s helmet and the traditional versions still retain a sense of that menace.

Special dishes for a special day

Traditionally in Japan, there are special foods that go with every holiday or occasion, and Children’s Day is no exception. Japanese people cook chimaki (粽) for this holiday—a rice cake made out of steamed sticky rice, or mochigome (餅米), wrapped in a bamboo leaf—and kashiwamochi (柏餅), a sweet Japanese treat. Here’s how to try your own.

Recipe: Chimaki

Kodomo No Hi: A Guide To Children’s Day In Japan

  • 3 cups of mochigome, 餅米 or glutinous rice (can be purchased at any supermarket in Japan). Rinse and leave in a colander for 30 minutes before cooking
  • Cooked pork, 150g (cubed, about 1 cm)
  • Dried baby shrimps, 20g (rehydrated and coarsely chopped)
  • Dried shiitake mushrooms, 4-5 (rehydrated and cubed, about 1 cm)
  • Bamboo shoots, 100g (cubed, about 1 cm)
  • Carrot, half (cubed, about 1 cm)
  • Shiitake and shrimp soaking liquid, about 3 cups
  • Soy sauce, 1 tbsp
  • Sugar, 1 tsp
  • Oyster sauce, 1 tbsp
  • Cooking sake, 2 tbsp
  • Salt, 1/2 tsp
  • Pepper, a pinch
  • Sesame oil, 2 tbsp
  • Bamboo leaves, 10 (wiped down with a damp cloth)
  1. In a large pot, heat the sesame oil and cook the rice and all other ingredients besides the seasonings and liquids for three minutes.
  2. After the rice starts to glisten, add all the seasonings and the liquids to the same pot. Stir constantly until liquid is gone. Be careful not to burn the rice at the bottom.
  3. Wrap the mixture with the bamboo leaves, make triangles, and tie with thin bits of the leaves. Steam for 10 minutes on medium heat.
  4. Turn off the heat and keep the lid on for an extra 10 minutes before serving.

Recipe: Kashiwamochi

Kodomo No Hi: A Guide To Children’s Day In Japan

This Japanese sweet (wagashi) calls for the seasonal kashiwa oak leaf to wrap the rice cakes in. It will give it its distinct look and name as these rice cakes are named according to whichever leaf it may be wrapped in. Here’s what you need to cook it: 

  • Jyoshinko,上新粉 (a fine/high-grade rice flour, available in any Japanese supermarket), 250g
  • Water, 350cc
  • Koshi an, こしあん (smooth sweet bean paste) or ogura an, 小倉餡 (sweet bean paste with whole beans), 300-350g (rolled into balls the size of plums, about 30g each)
  • Kashiwa oak leaf, 10 (washed and dry patted)
  1. In a heatproof glass bowl, add the flour and water. Mix well. Cover with cling film and microwave for five minutes and 30 seconds at 600w.
  2. Knead 15 to 20 times on a large piece of cling film.
  3. After kneading, put the dough in a Ziploc bag and chill it on iced water for about 20 minutes. Make sure to not get any water in the bag.
  4. After it’s chilled, knead it four to five more times.
  5. Break it up into about 10 pieces (about 50g each). Roll them out so they look like stretched pennies, put the koshi an or oguro an onto one end of the oval and fold it over, pinching the edges together.
  6. Cover the less attractive side with the kashiwa oak leaf and voilà!

Now you’re ready to set the table, raise your koinobori-flag and your glass to all children around Japan and the world. Happy Children’s Day!


This article was originally published in 2017 and updated with the latest information on May 4, 2020. 


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