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Nanatsu no Ko
Nanatsu no Ko

七つの子 本居長世<癒しの30弁オルゴール>

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), is a popular Japanese children's song written by Ujō Noguchi (野口雨情 Noguchi Ujō). Renya Karasuma, the boss of the Black Organization, uses this song to encode his mail address.


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.


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


Hearing Nanatsu no Ko

Conan hears Kir dial the boss's number.

Vermouth arc[]

Conan first heard the boss's mail address 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[]

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[1] 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[2], which was purposefully made non-functional by Gosho Aoyama to prevent prank calls.[3]

Kir arc[]

He heard Kir dial the boss's 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.


Karasu naze nakuno
Karasu wa yama ni
Kawaii nanatsu no
Ko ga aru kara yo

Kawai kawai to
Karasu wa nakuno
Kawai kawai to

Yama no hurusu e
Itte mite goran
Marui me o shita
Iiko da yo

Mother crow, why do you squawk so?
Because high on the mountain
I have seven cute children.

"Cute, cute,"
This mother crow sings.
"Cute, cute,"
Cries the mother crow.

You should behold the old nest
On the mountain. And there you'll see such
Round-eyed, good children.

烏 なぜ啼くの

可愛 可愛と
可愛 可愛と



  1. In Japan, an e-mail address is assigned to each mobile phone.
  2. In episode 398 the number is erroneously written as #696#6261.
  3. 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[]


Detective Conan World Wiki

Black Organization
High Ranking Renya KarasumaRumGinVermouth
Other Agents VodkaKir (undercover) • ChiantiKornBourbon (undercover)
Deceased Agents Akemi MiyanoTequilaPiscoAtsushi MiyanoElena MiyanoCalvadosRikumichi KusudaEthan Hondou (undercover) • 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) • Kate Lauren (Playstation only)
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