Every year on May 5th, something special happens across Japan. Colorful carp-shaped windsocks fill the sky above rivers and rooftops, ornate samurai helmets appear in shop windows, and the air smells faintly of oak leaves wrapping sticky rice cakes.
This is Kodomo no Hi — Japan’s Children’s Day — and if you happen to be traveling during Golden Week, it’s one of the most visually memorable experiences the country has to offer.
Golden Week is Japan’s longest consecutive holiday period, running roughly from late April through early May. Kodomo no Hi falls on its final day — May 5th — making the streets and parks feel especially festive.
While the holiday is technically about celebrating children, its roots go far deeper, into ancient seasonal rituals, warrior culture, and centuries-old beliefs about protecting the ones you love.
Even if you don’t have children of your own, Kodomo no Hi is worth knowing about — and worth planning around.
This guide covers everything from its origins and symbols to the best places to experience it, plus practical tips for visiting Japan during one of the busiest travel weeks of the year.
What Is Kodomo no Hi? Origins and Meaning
Kodomo no Hi (こどもの日) literally means “Children’s Day.” It was officially established as a national holiday in 1948, defined by law as a day “to respect the individuality of children, plan for their happiness, and express gratitude to mothers.”
But the holiday has a much older counterpart: Tango no Sekku (端午の節句), the Boys’ Festival, which has been observed in Japan since the Nara period (710–794 CE).
Originally imported from China, the festival was held to ward off illness and evil spirits at the start of summer.
Over time, it merged with samurai culture during the Edo period (1603–1868), and the display of armor and helmets became associated with prayers for a son’s strength, health, and success.
Today, Kodomo no Hi is no longer limited to boys — it celebrates all children, regardless of gender. The samurai trappings remain, but the spirit has broadened into something more universal: a wish for every child to grow up strong, healthy, and loved.
Koinobori — The Carp Flags That Fill the Sky
Of all the symbols associated with Kodomo no Hi, koinobori (鯉のぼり) are the ones you’re most likely to spot from a distance. These large, fish-shaped windsocks are typically made of cloth or nylon, and when the wind blows through them, they billow open to look as though they’re swimming through the air.
The imagery comes from a Chinese legend: a carp that swam upstream against a powerful current and leaped over a waterfall to become a dragon. In Japan, this became a metaphor for perseverance — the hope that children will face life’s challenges with the same determination.
What the colors represent:
- Black (magoi): the father
- Red (higoi): the mother
- Blue or green: the child (or children — additional smaller carp are added for each child in the family)
A full set of koinobori hung outside a home represents the entire family. In public spaces — riverside parks, bridges, shopping districts — hundreds or even thousands of them are strung up together, creating scenes that feel genuinely otherworldly.
Best Places to See Koinobori in Japan
Several festivals around Japan are worth planning a trip around. Note that 2026 dates below reflect confirmed or historically consistent schedules — always check official event websites before traveling, as dates can shift.
Asanogawa Koi-nagashi — Floating Koinobori (Kanazawa, Ishikawa Prefecture)
Usually held around May 4th.
A uniquely beautiful variation: instead of flying koinobori, this event floats them down the Asano River, similar to the Yuzen fabric-dyeing tradition Kanazawa is known for.
Pair with a walk through Higashi Chaya, the old geisha district, just steps away.
Tokyo Skytree Town Koinobori Festival (Tokyo, Sumida Ward)
April 10 ~ May 6
Around 1,000 koinobori are displayed throughout the Solamachi shopping complex at the base of Tokyo Skytree.
An easy addition to any Tokyo itinerary.
Tokyo Tower — 333 Koinobori Display (Tokyo, Minato Ward)
March 18 ~ May6
333 carp flags hung at the base of Tokyo Tower (the number matches the tower’s height in meters).
Also includes a giant “sanma-nobori” — a Pacific saury-shaped flag honoring the city of Ofunato in Iwate Prefecture.
Koinobori no Sato Matsuri —Guinness Record Festival (Tatebayashi, Gunma Prefecture)
March 20 ~May6
Over 4,000 koinobori hang along the Tsuruuta River and across four locations throughout the city. In 2005, the festival set a Guinness World Record with 5,283 carp flags simultaneously displayed.
Runs from late March to mid-May, making it one of the longest-running koinobori events in the country. Accessible from Tokyo via the Tobu Line.
Kanna Koinobori Festival (Kanna Town, Gunma Prefecture)
Festival events run May 3–5; flags are displayed from April 26~May 10
Around 800 carp flags hang over the clear waters of the Kanna River, surrounded by mountains. A quieter, more rural experience.
Koinobori no Kawawatashi —The River Crossing (Shimanto Town, Kochi Prefecture)
April 12 ~ May 9
The River Crossing (Shimanto Town, Kochi Prefecture) — Considered the birthplace of the now-widespread “river crossing” style of koinobori display. Around 500 carp flags are strung across the Shimanto River using cables stretched from mountain to mountain, fluttering above Japan’s last “clear-water” river.
Displayed from mid-April to mid-May. Requires some travel effort from major cities — best combined with a broader Shikoku trip.
Kabuto and Warrior Figurines — The Samurai Side of the Holiday
Inside Japanese homes in the weeks leading up to Kodomo no Hi, you’ll often find elaborate decorative displays featuring kabuto (兜) — traditional samurai helmets — alongside miniature suits of armor and warrior figurines known as gogatsu ningyo (五月人形), or May dolls.
These aren’t antiques — they’re ornamental pieces, often passed down through generations or gifted by grandparents when a child is born. The symbolism is protective: just as a helmet shielded a warrior from harm, the display is thought to protect a child from illness and misfortune.
As a visitor, you’re most likely to encounter these in department stores and traditional craft shops, where elaborate displays are set up throughout April and early May. Many souvenir shops in places like Kyoto, Kamakura, and Asakusa sell miniature kabuto as keepsakes — a more meaningful alternative to the typical fridge magnet.
What to Eat on Kodomo no Hi
Seasonal food is central to most Japanese holidays, and Kodomo no Hi is no exception. The two sweets most closely associated with this day are kashiwa mochi and chimaki — both made from rice, and both rooted in symbolism.
Kashiwa Mochi
A soft, pounded-rice cake (mochi) filled with sweet red bean paste, wrapped in a dried oak leaf. The leaf gives it a faintly earthy, slightly smoky aroma — distinct from the filling, which is subtly sweet.
The oak tree (kashiwa) holds a special place in Japanese culture: its old leaves don’t fall until new ones grow in spring.
This became a metaphor for family continuity — the old generation staying in place until the next one is ready to take over.
Eating kashiwa mochi is, in a sense, eating a wish for your family line to continue.
You’ll find kashiwa mochi in wagashi (traditional sweet) shops, department store basement food halls, and even convenience stores throughout April and May. The leaf is not meant to be eaten.
Chimaki
Chimaki are pyramid-shaped dumplings made from glutinous rice or arrowroot starch, wrapped in bamboo or reed leaves and tied with string. They have a delicate, almost translucent appearance, and a mildly sweet or lightly savory taste depending on the variety.
Originally introduced from China, chimaki are strongly associated with the Kansai region (Osaka, Kyoto, Nara). In Kyoto in particular, chimaki sold at shrines during this season are treated as protective charms rather than food — some households hang them above their front doors for good luck.
Events and Experiences to Look For
Beyond the koinobori festivals listed above, a few other types of events are worth keeping an eye out for during this season.
- Shrine ceremonies — Some Shinto shrines hold special rites connected to Tango no Sekku, with priests offering prayers for children’s health. These tend to be quiet, local affairs — the kind of thing you might stumble into while exploring a neighborhood shrine.
- Kabuto-making and mochi workshops — Cultural centers, craft shops, and some hotels in tourist areas occasionally run hands-on workshops during Golden Week where you can fold a kabuto from newspaper or make kashiwa mochi. These fill up fast, so book in advance if you’re interested.
- Museum special exhibitions — History and folk art museums often put kabuto, armor, and gogatsu ningyo on special display during April and May. This is one of the best ways to see high-quality, historically significant pieces up close.
- Theme parks and aquariums — Major attractions like Disneyland, Universal Studios Japan, Tokyo Skytree’s Sumida Aquarium, and others often run Kodomo no Hi tie-in events. Expect crowds but also unusually festive decorations.
Note: Golden Week is one of the busiest travel periods in Japan.
Book transportation, accommodation, and any workshop tickets well in advance — sometimes months ahead for popular spots.
Aizu Bukeyashiki is a living history museum in Aizuwakamatsu where you can explore samurai life, learn about the Boshin War, and enjoy hands-on cultural experiences such as Akabeko painting.
For more information, please click here.
Click here to read an article about the Japanese confectionery experience in Kyoto.
Practical Tips for Visiting Japan During Golden Week
Golden Week runs from approximately April 29th to May 5th (sometimes stretching through May 6th if the holiday falls mid-week). It’s the single busiest travel period in Japan — domestic tourists flood popular destinations, and international visitors add to the mix. Here’s what to expect and how to prepare.
- Bullet trains (Shinkansen) book out weeks or months in advance.
If you’re planning intercity travel — especially to Kyoto, Osaka, Hiroshima, or Nagoya — reserve your seats as early as possible. - Accommodation in popular destinations (Kyoto, Hakone, Tokyo) can sell out months in advance for the Golden Week window.
Book early, or consider staying in a slightly less central area. - Museums, amusement parks, and popular temples will have longer-than-usual queues.
Arriving first thing in the morning makes a significant difference. - Convenience stores (7-Eleven, FamilyMart, Lawson) stay open as usual — a reliable fallback for food, ATMs, and last-minute supplies.
- English-speaking staff are available at most major tourist facilities, but in rural areas or smaller towns, Japanese-only service is still common. A translation app helps.
- Cash is still widely used in Japan, especially at local festivals, street stalls, and smaller shops.
Summary
Kodomo no Hi is one of those holidays that doesn’t require any special knowledge to appreciate — but knowing the story behind it makes it richer.
A thousand carp flags catching the wind above a river isn’t just a pretty sight; it’s a thousand families quietly hoping their children will grow up strong.
A miniature helmet on a shelf isn’t just a decoration; it’s a piece of armor placed there with care.
If you’re traveling in Japan around May 5th, lean into it. Try the kashiwa mochi. Find a koinobori festival. Wander into a neighborhood shrine. The crowds of Golden Week are real, but so is the atmosphere — and the atmosphere, at this time of year, is genuinely unlike anything else.
