Girls Day Mystery 4

Chronology

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List of Episodes

List of Filler Cases

Episode "ZERO" The Shinichi Kudo Aquarium Case  ›

Episode 1186
(Int. Episode 1244)

Information

Title:

Girls Day Mystery 4

Japanese title:

女子会ミステリー4(フォー)
(Joshikai Misuterī Fō)

Original airdate:

December 27, 2025

Filler case number:

#453

Season:

30

Manga source:

TV Original

Case

Cast:

Conan Edogawa
Hiroshi Agasa
Ran Mouri
Sonoko Suzuki
Ayumi Yoshida
Ai Haibara
Miwako Sato

Case solved by:

Ai Haibara

Next Conan's Hint:

Holy grail

Staff

Director:

Yasuichiro Yamamoto
Nobuharu Kamanaka

Screenplay:

Akatsuki Yamatoya

Storyboard:

Mitsuko Kase

Episode director:

Minoru Tozawa

Animation director:

Keiko Sasaki

Character design:

Masatomo Sudo
Masanori Hashimoto (sub-character)
Hiroshi Ogawa (design works)

Voice cast:

Minami Takayama as Conan Edogawa
Kenichi Ogata as Hiroshi Agasa
Wakana Yamazaki as Ran Mouri
Naoko Matsui as Sonoko Suzuki
Yukiko Iwai as Ayumi Yoshida
Megumi Hayashibara as Ai Haibara
Atsuko Yuya as Miwako Sato
Takeo Otsuka as Yukio Kashima
Chiaki Kobayashi as Sora Tsujino
Daisuke Kasuya as Police officer
Sara Matsumoto as Naoko Shimamura
Haruka Okamura as Satomi Amari
Yasuhiro as Ryuichiro Mita
Takayuki Kondo as Shunsuke Yoshimura
Ayumi Hinohara as Kyoka Kasai

Music

Opening song:

"Poker Face"

Closing song:

"Fun! Fun! Fun!"

Girls Day Mystery 4 (女子会ミステリー4(フォー) ,Joshikai Misuterī Fō) is the 1186th episode of the Detective Conan anime.

Cast

Characters

Conan Edogawa

Hiroshi Agasa

Ran Mouri

Sonoko Suzuki

Ayumi Yoshida

Ai Haibara

Miwako Sato

Case

Situation

Haibara, Ayumi, Ran, Sonoko, and Sato go to an all-you-can-eat sweet shop in Haido City Royal Hotel, celebrating the good health and future achievements of the girls. However...

Food poisoning - attempted murder

Location: An all-you-can-eat sweet shop in Haido City Royal Hotel

Victim: Satomi Amari (deceased), Naoko Shimamura (injured)

Age: 21 years old

Poison: Snake venom

Suspects: Naoko Shimamura, Kyoka Kasai, Ryuichiro Mita, and Shunsuke Yumemura

The two ladies began to writhe in pain and suddenly collapsed after consuming the drink, with one having passed away.

Ran tries to contact Shinichi for help solving the case, while Ayumi calls Conan. However, none of their calls are answered, as the owner of the two phones is busy fishing with Professor Agasa. It seems the girls will have to solve the case on their own.

The police begin to interrogate people who were nearby when the incident occurred, as usual.

• Kyoka Kasai, an employee of the shop who is also a sociological student at Haido Women’s College, along with the two victims, said that the two girls were good and earnest, while still crying over Satomi Amari’s death. She also states that no one hates the two of them.
• Ryuichiro Mita, an Office worker at the Haido Brotherhood Company, remembers that Naoko Shimamura may have interviewed for a position in the company.
• Shunsuke Yumemura, a municipal worker, is seen acting strangely upon being shown the piece of skin left at the scene by the police, which catches the attention of Ayumi.

The second round of interrogation begins as the girls suspect that Yumemura is not the only one out of three to know about snakes:

• As Ayumi expresses her suspicion toward Yumemura, he then has to reveal that he is also a snake hunter, and he was afraid of being convicted for murder if he told them the piece was from a snake. In addition, the cause of the poisoning is revealed to be snake venom. What a coincidence!
• The next one, Kasai, confesses to the girls that she herself also knows snakes, as she is working very hard to become an underground snake charming idol. Kasai also notes that the snake she has for training, Kobu, has had its fangs removed so that Kobu can bite her all day and she’ll be just fine!

After reviewing the information they’ve just gathered, Ayumi proposes using their imagination to figure out who the true culprit might be, which further confirms that anyone could be the culprit. Just then, Ran’s statement helps Haibara realize something, as she then asks the two police officers to confirm a few things.

People

Satomi Amari
	21 years old Victim (poisoned) Sociology student at the Haido Women’s College

Naoko Shimamura
	21 years old Victim (poisoned-injured) Sociology student at the Haido Women’s College

Kyoka Kasai
	21 years old Sociology student at the Haido Women’s College Underground snake charmer idol

Ryuichiro Mita
	44 years old Office worker at the Haido Brotherhood Company

Shunsuke Yumemura
File:Shunsuke Yumemura.jpg	32 years old Municipal officer Snake hunter

Police officer A
File:Police officer A.jpg

Police officer B
File:Police officer B.jpg

Resolution

  Show spoilers »

Haibara’s theory: Since the statement of medicines being less effective the more you use them also applies to poison, Haibara suggests that Naoko Shimamura repeatedly ingests snake venom. Hence, she has enough tolerance to survive doses that usually kill a human.

It is also revealed that Satomi Amari once insulted the snake Naoko Shimamura bred half a year ago during an argument. The police also received information that Shimamura had gotten away from the hospital. This further supports the suspicion that Shimamura became upset and waited for an opportunity to seek revenge.

However, it is unclear why the girls and the two officers end up surrounded by snakes. Suddenly, Kyoka Kasai, Ryuichiro Mita, and Shunsuke Yumemura come to the rescue. Kasai had overheard that Shimamura had disappeared from the hospital and thought she must have come to the current location, so she called the other two for assistance. Just as the case seems to be over, a black, seemingly venomous snake bites Sonoko. But it turns out that the snake is not even venomous, and Sonoko faints, thinking that a venomous one bit her.

Trivia

• The "challenge" to poison the holy grail is a reference to Indiana Jones.
• The fish Conan caught in the episode were the following: A box fish, a scrawled filefish, a brown-lined puffer, and a Makogarei. All of which, except the last one, are venomous.

Gallery

In other languages

Language	Title	Translation
French (Subbed)	Une enquête entre filles 4	Girls' investigation 4

See also

• Season 30
• Girls Day Mystery (series)