Detective conan Wiki
Episode 6
TV Episode 6
Title: The Valentine Murder Case
Japanese title: バレンタイン殺人事件

(Barentain Satsujin Jiken)

Broadcast rating: 12%
Filler case: #1
Original airdate: February 12, 1996
Season: 1
Manga source: TV Original
Cast: Conan Edogawa

Ran Mouri
Sonoko Suzuki
Kogoro Mouri
Inspector Megure
Professor Agasa
Detective Boys

Case solved by: Kogoro Mouri (via Conan)
Next Conan's Hint: Chocolate
Director: Kenji Kodama
Screenplay: Toshiki Inoue
Storyboard: Shigeru Morikawa
Episode director: Yuji Yamaguchi
Animation director: Kei Hyoudou
Opening song: Mune ga Dokidoki
Closing song: STEP BY STEP
Prev episode: « The Shinkansen's Bomb Case
Next episode: Once-A-Month Present Threat Case »
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Characters introduced[]

Gadgets introduced[]




Voice-Changing Bowtie Voice-Changing Bowtie


Situation []

Ran is invited to attend a Valentine's party by a young man and a jealous Conan follows her. During the party, Katsuhiko, the party host, is poisoned.


EP6 Case

Location: Minagawa household-Yard
Victim: Katsuhiko Minagawa
Cause of death: Poison
Suspects: Toshihide Wakamatsu, Kaori Sekiya, Yoshimi Watanabe, Naomichi, and Minagawa's mother
Katsuhiko collapsed dead onto the ground from poison outside his house after eating a piece of Yoshimi's chocolate.

People []

Resolution []

  • Evidence
    • Katsuhiko’s heart literally stopped on Valentine's Day. Beside his dead body, a cigarette and a chocolate bar were found among his usual items.
    • Before the tragedy, he was in his small party where they ate and drank. On Valentine’s day (because of the tradition), each girl gives a guy a bar of chocolate, to which the guy would consume preferentially.
    • Conan noticed that even though her son died, Katsuhiko's mother is doing the dishes.
    • Susumu ate chocolate which angered his mother , but she suddenly had a change of heart and gave him some cake despite Susumu's previous troubles with cavities.
  • Conclusion

After putting Kogoro to sleep with the Stun-Gun Wristwatch, Conan, using the Voice-Changing Bowtie, revealed how Katsuhiko’s real killer was his mother.

Katsuhiko does not smoke with filters, that’s why Naomichi’s attempt to poison him through this, failed. Meanwhile, his mother knew his habits, and put poison in his coffee, knowing that he wouldn’t eat the antidote in the cake. The reason she had a change of heart when Susumu drank the coffee is because he drank the coffee with the poison, so she quickly gave him the antidote in the cake so he wouldn't die. She also framed Yoshimi by switching the chocolates she gave him with a half-eaten bar that Katsuhiko apparently ate. Though his mother immediately washed all the cups and switched the chocolates, it is pointed out that forensics could inspect the drainage to find the poison and the swapped chocolate is already visibly melting through the culprit's kimono.

  • Motive

When her husband’s business took a turn for the worse, Katsuhiko's mother had to think of the quickest way to acquire Katsuhiko’s estate, and save the house.

Katsuhiko is an orphan who was adopted by his only living relative when he was a kid. His foster mother knew he fell in love with Yoshimi since she closely resembled his deceased mother, so she framed her.

BGM listing[]

# Song Title Romaji Translation OST
1 胸がドキドキ Mune ga Dokidoki The Pounding of My Heart Mune ga Dokidoki
2 蘭のテーマ Ran no Tēma Ran's Theme Detective Conan Original Soundtrack 1
3 蘭・愛のテーマ (ギターver.) Ran・Ai no Tēma (Gitā ver.) Ran's Love Theme (Guitar ver.) Detective Conan Original Soundtrack 2
4 小さな巨人 Chiisana Kyojin A Small Great Person Detective Conan Original Soundtrack 1
5 コナンの勝利 Konan no Shōri Conan's Victory Detective Conan Original Soundtrack 1
6 コナンの勝利 (夜空ver.) Konan no Shōri (Yozora ver.) Conan's Victory (Night Sky ver.) Detective Conan Original Soundtrack 2
7 (Unreleased BGM 2)
8 沈む夕陽 Shizumu Yūhi Depressing Sunset Detective Conan Original Soundtrack 1
9 脅迫 (パート2) Kyōhaku (Pāto 2) Threat (Part 2) Detective Conan Original Soundtrack 2
10 悪のテーマ (パート2) Aku no Tēma (Pāto 2) Theme of Evil (Part 2) Detective Conan Original Soundtrack 2
11 事件現場 (オリジナルver.) Jiken Genba (Orijinaru ver.) Scene of the Case (Original ver.) Detective Conan Original Soundtrack 2
12 犯人のアジト Hannin no Ajito The Culprit's Hideout Detective Conan Original Soundtrack 1
13 緊迫 Kinpaku Tension Detective Conan Original Soundtrack 2
14 名探偵コナン・メインテーマ (ヴォーカル・ヴァージョン) Meitantei Konan・Mein Tēma (Vōkaru・Vājon) Detective Conan Main Theme (Vocal Version) Detective Conan Original Soundtrack 1
16 蘭・愛のテーマ (ギターver.) Ran・Ai no Tēma (Gitā ver.) Ran's Love Theme (Guitar ver.) Detective Conan Original Soundtrack 2



  • This is the first anime case in which a murder victim is poisoned.
  • This episode features the first use of the anime's second post-credits stinger image, featuring Conan in a "thinking" pose.

See also[]


Detective Conan World Wiki

Episodes of Season 1
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