“Nanatsu no ko” is one of Japan’s most familiar children’s songs.

It is also well known as music played by local authorities to encourage children playing outside to return home in the evening.

The song depicts the universal love between parents and their children through the image of parent crows that descend to the village in search of food for their chicks waiting in the nest in the mountains. Notably, the song portrays crows, often seen as pests, as affectionate parent birds. This perspective, which sympathetically captures the fact that crows have parenting feelings no different from humans, is a significant reason for the work’s great popularity.

The original Japanese title is “Nanatsu no ko,” and there has been controversy over whether this is “seven children” or “seven-year-old children.

The prevailing theory was that a seven-year-old should already be an adult bird as a raven, so why not seven children? The prevailing theory was that “seven-year-olds” should have already reached maturity as crows, so why not use the title “seven children”? Wouldn’t that be more natural? There was an objection that “seven children” would be more natural. It is also said that crows do not raise as many as seven chicks at a time. This led to the theory that “raven” was a metaphor. The lyricist, Noguchi, was the first to suggest that the word “crow” was a metaphor. The lyricist, NOGUCHI Ujyou, was separated from his mother when he was 7 years old. Another theory is that Ujyou was born and raised in Kitaibaraki City, which used to be a prosperous coal-mining town, and the miners who worked in the dust were called “crows,” so he sang about them working for their families.

On the other hand, Ujyou, who could not adapt to his political marriage, took custody of his two children after the divorce. However, as the children cried every night longing for their mother, he decided to return them to her. It is said that he expressed his torn feelings as a father in a song during that time.

Incidentally, crows in Japan were often regarded as sacred birds. Yatagarasu, the symbol of the Japan Football Association, is a three-legged raven that is said to have guided Emperor Jinmu, the founder of Japan. In the Shugendo sect, which originated from mountain worship, the crow has also been regarded as a messenger of the gods.Crows also play an important role in the anime “Kimetsu no yaiba.

WolfgangMichel – 投稿者自身による著作物, CC 表示 3.0, リンクによる

Karasu-no-nureba-iro,” used to describe a woman’s beautiful black hair, refers to the deep, glossy, dark purple color of a crow’s wet feathers.

A Song that Continues to Signal Evening

While many old dōyō (children’s songs) and shōka (school songs) have disappeared from music textbooks and are gradually being forgotten, Yuuyake Koyake remains widely beloved. One reason is that many municipalities use it as a time signal melody to remind children playing outside that it is time to go home. In residential neighborhoods, when this melody flows from the speakers at dusk, people instinctively feel, “It’s time to return home.” This custom has been naturally handed down across generations, to both children and parents.

The Lyricist NAKAMURA Ukou and the Sunset Scene

The lyricist, Nakamura Ukou, originally aspired to be a children’s story writer. However, the principal of the elementary school where he worked opposed this, believing it would interfere with his duties as an educator, and thus he turned to songwriting.
During his commute from his home in Ongata Village to Hachiōji Station—a journey of about 16 kilometers on foot—Ukō would often be moved by the evening sky. It is said that the sunset he saw on his way home inspired the lyrics, blending with memories of his childhood and the scenery of his native village. Along the way stood many temples, and the sound of their bells must have echoed with the twilight.

The Song’s Struggle to Reach the Public

It took four years for this piece to finally reach composer KUSAKAWA Shin after Ukou wrote the lyrics in 1919. The reasons for this delay remain unclear. The song was eventually published in 1923, but the Great Kantou Earthquake that struck the same year destroyed nearly all printed copies. Fortunately, thirteen copies that had been distributed to those involved survived, and the song was republished in 1929, barely managing to pass down to the present day.

The Nostalgic Sound of the Yonanuki Scale

Another reason Yuuyake Koyake has endured for so long lies in its distinctive musical scale. The song uses Japan’s traditional yonanuki scale (a pentatonic scale omitting the 4th and 7th notes—F and B in C major). This scale creates a nostalgic, bittersweet sound that resonates deeply with listeners. Its tones, perfectly matched with the twilight scenery, have made the melody one that transcends generations.

The word “yonanuki” means the old Japanese way of reading numbers: Hi, Fu, Mi, Yo, Itsutsu, Mutsu, Nanatsu… without the 4 and 7 sounds.

A Song Etched in People’s Evening Memories

Thus, “Yuuyake Koyake” has become more than just a school song—it is a “song of dusk” that has woven itself into the fabric of Japanese daily life. Even today, when the melody plays in residential neighborhoods as a time signal, many people are reminded of their childhood walk home, or the evenings they spent playing with friends under the glowing sky. The song continues to live on in everyday life, making it one of the most widely cherished douyo in Japan.

It was also selected as one of the “100 Best Japanese Songs.

Moon-viewing is incomplete without offering rice dumplings. / By katorisi – Own work, CC BY 3.0, Link

The Custom of Admiring the Harvest Moon

In Japan, the 15th day of the 8th month of the lunar calendar (around late September today) is called Jyuugoya or Chuushuu no Meigetsu, and it is celebrated as the night when the moon is at its most beautiful of the year. On this evening, people place offerings of pampas grass, rice dumplings, and seasonal harvests, and enjoy gazing at the moon in the crisp autumn air. The sight of families and friends looking up at the bright moon, sometimes with a cup of sake in hand, conveys a uniquely Japanese autumn atmosphere.

Haiku and the Humor of the Full Moon

KOBAYASHI Issa, one of the representative haiku poets of the Edo period, composed the following verse:

Meigetsu wo totte kurero to naku ko kana
名月を取ってくれろと泣く子かな
(A child carried on his back points to the full moon and cries, “Please get it for me.”)

Yoshi Canopus – 自ら撮影, CC 表示-継承 3.0, リンクによる

This scene, humorous in tone yet full of seasonal elegance, is a well-known haiku even today. It reminds us of the cultural richness of the Meigetsu (harvest moon).

The Poetic Eye of NOGUCHI Ujyou

The lyrics of Jyuugoya Otsukisan were written by NOGUCHI Ujyou, a renowned poet of children’s songs. He is also the author of lyrics for masterpieces such as “Nanatsu no Ko” and “Akai Kutsu”. NOGUCHI’s strength lay in his ability to depict the world through the innocent eyes of children, while subtly weaving in the realities of the society of his time. In this song, too, beneath the simple words of a child addressing the moon lies a heartfelt longing for the mother he misses.

Hidden Social Realities of the Taishou Period

At first glance, the lyrics of Jyuugoya Otsukisan may sound like an innocent child’s monologue to the moon. Yet, in reality, they reflect the social struggles of the Taishou era. After experiencing an economic boom during World War I, Japan plunged into a postwar recession. Many factory workers in the cities lost their jobs and were forced to return to the countryside, placing heavy economic burdens on farming households.

Family Separation and the Cry of a Child’s Heart

Because of this hardship, many rural households had to let go of their housekeepers (baaya), and poverty forced them to send their younger daughters away for work. In this context, the child singing longs for his absent mother, perhaps never to see her again, entrusting his sorrow to the moon. Simple though the lyrics may be, they are imbued with the deep sadness of family separation in that era.

The Power of MOTOORI Nagayo’s Melody

The melody was composed by MOTOORI Nagayo. His music, at once beautiful and tinged with melancholy, brought out the sorrow of the child’s heart and the shadow of society hidden behind the lyrics. The harmony of the moon’s beauty with this sadness made the song unforgettable, leaving a deep impression on Japanese hearts.

The children’s song “Yuuhi” (The Sunset) was written in 1921 by KUZUHARA Shigeru (from Hiroshima Prefcture), with music composed by MUROZAKI Kingetsu(from Toyama Prefcture). It continues to be cherished for its depiction of nature’s beauty, with the phrase “Ging-Ging-Gira-Gira” standing out as a symbol of the song. This onomatopoeia vividly captures the intense light of the setting sun, conveying the power of the moment through the sound of the words. The sharpness of “Ging-Ging” mirrors the brilliance of the light, and the rhythm gives a sense of presence, as if one is witnessing the sunset firsthand.

Interestingly, this phrase was originally “Kin-Kin-Kira-Kira” (bright and shining like the morning sun). However, Kusakawa’s second-grade daughter suggested, “The morning sun may be ‘Kin-Kin-Kira-Kira,’ but shouldn’t the sunset be ‘Ging-Ging-Gira-Gira’ instead?” This suggestion led to the change in the lyrics, better capturing the strength and distinctiveness of the setting sun. This anecdote highlights how a child’s fresh perspective can influence even a refined work and underscores the importance of such genuine sensibilities in children’s songs.

The repeated phrase “makka-kakka” (deep red) further enhances the song’s simplicity and effectiveness. Its rhythmic repetition helps children easily memorize the song, while simultaneously conveying the image of the sky turning completely red. The rhythm and sound of these words create a sense of unity with the expanding colors of the sunset, making it easy for children to feel connected to the changing beauty of nature.

By A.Davey from Portland, Oregon, EE UU – Man with a Crowd, CC BY 2.0,

In 1921, despite the rapid urbanization, watching the sunset was still a part of everyday life for many children. The sight of the sky turning red at the end of the day was a shared experience, whether in the city or countryside. “Yuuhi” captures this universal moment, transforming a simple daily occurrence into a song that helps children feel the beauty of nature and the emotional resonance of a day’s end.

By A.Davey from Portland, Oregon, EE UU – A Group of Girls, CC BY 2.0,

Expressions like “Ging-Ging-Gira-Gira” and “makka-kakka” go beyond mere description, appealing directly to a child’s senses. KUSAKAWA Shigeru skillfully used such childlike expressions to convey the wonder of nature through song. In addition, the melody is highly rhythmic, evoking the image of children’s light, playful steps. The rhythm naturally invites movement, allowing children to physically experience the joy of nature as they sing. “Yuuhi” was not just a song to enjoy but also a way for children to experience the grandeur and fleeting beauty of nature.

The Taisho period, when this song was created, reminds me of Kimetsu no Yaiba (Damon Slayer). This picture shows AI’s idea of “Kimetsu no Yaiba.

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