Nanatsu no Ko

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Nanatsu no Ko

Nanatsu no Ko.jpg

Title: 七つの子
Composer: Ujō Noguchi
Published in: July, 1921
Written in: Nagoya, Japan
Language: Japanese
Form: Children's song

Nanatsu no Ko (七つの子 ?, lit. "Seven children or Child of seven")[1][2], is a popular Japanese children's song written by Ujō Noguchi. The boss of the Black Organization uses this song to encode his phone number.[3]


The name of the song can be validly read in two ways: seven children or child of seven, meaning seven year old child. Although not a literal translation, the song name is occasionally romanized as Seven Baby Crows or The Crow's Seven Chicks.[4]


Ujō Noguchi wrote and published Nanatsu no Ko in Kin no Fune ("The golden ship") magazine on July 1921.[4][2] Nanatsu no Ko is used as the departure melody at Isohara Station in Kitaibaraki.


Conan hears Kir dial the boss' number.

Vermouth arc[edit]

Conan first heard the boss's phone number when Vermouth texted the boss after the showdown with her. He didn't recognize the tune at first although he thought it was familiar sounding and had a sad feeling to it.

Cellphone arc[edit]

Conan noticed that the first few notes sounded very close to the area code for Tottori prefecture. He guessed that it was a song starting with notes "B A G A". He discovered the song Nanatsu no Ko matched the sound of the key presses after asking Kyosuke Haga‎ what songs start with "H A G A" (B is substituted for H in German).

The phone number[5] follows the tune of the first few notes "Mother crow, why do you cry?" of the song. The area code phone number for Kurayoshi and Yazu in Tottori Prefecture, 0858, do sound like the "Mother crow" part, but "Why do you cry" doesn't work. The notes on a cell phone are FA for 1, 2, 3; SOL for 4, 5, 6; LA for 7, 8, 9; and SI for *, 0, #. Each note gates slightly lower as you move to the left on the dial. So if we start with # and not 0, and don't care if the notes are slightly off, we get the email address #969#6261[6], which was purposefully made non-functional by Gosho Aoyama to prevent prank calls.[7]

Kir arc[edit]

Conan heard Kir dial the boss' number and discovered she was a member of the Black Organization. Later Eisuke Hondou, who knew the number by the tune because his father used to text the boss, heard someone in the hospital where Kir was being held dial it. Ran relayed this information to Conan who learned there was an undercover organization spy among the patients looking for Kir.



  1. ^ (also source of the rōmaji and English lyrics)
  2. ^ a b
  3. ^ When Aoyama called home, since the area code sounded like that song, he decided to use it.
  4. ^ a b Crow's Song
  5. ^ In Japan, an e-mail address is assigned to each mobile phone.
  6. ^ In episode 398 the number is erroneously written as #696#6261.
  7. ^ In real life, # signs can't be used in an email address, but Gosho Aoyama decided to use them here to prevent pranks.

External links[edit]

Black Organization
High Ranking The BossRumGinVermouth
Other Agents VodkaKir (undercover) • ChiantiKornBourbon (undercover)
Deceased Agents Akemi MiyanoTequilaKenzo Masuyama/PiscoAtsushi MiyanoElena MiyanoCalvadosRikumichi KusudaEthan Hondou (undercover) • Hiromitsu Morofushi/Scotch (undercover)
Former Agents Shiho Miyano/Sherry (Ai Haibara) • Shuichi Akai/Dai Moroboshi/Rye (undercover) • Ki'ichiro Numabuchi
Extended canon Yoshiaki Hara (movie only) • Irish (movie only) • Masaaki Okakura (movie only) • Arrack (special manga only) • Generic (special manga only) • Blackbeard (special manga only) • Antonio Gomez (shogakukan learning series only) • Two men (shogakukan learning series only) • Kate Lauren (playstation only) • Curaçao (movie only) • Stout (movie only) • Aquavit (movie only) • Leona Bucholz/Riesling (movie only) • Man in bar (tv special only) • Drama assassin (drama only)
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