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The Spiral Mansion Mystery

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Chronology
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Episode 1195-1196
(Int. Episode 1254-1255)

Information
Title: The Spiral Mansion Mystery
Japanese title: 館ミステリー 渦巻館
(Yakata Misuterī Uzumaki-kan)
Original airdate: March 28, 2026 (Part 1)
April 4, 2026 (Part 2)
Broadcast rating: 4.9% (Part 1)
6.0% (Part 2)
Filler case: #458
Season: 31
Manga source: TV Original
Case
Cast: Conan Edogawa
Ran Mouri
Kogoro Mouri
Juzo Megure
Wataru Takagi
Yoko Okino
Case solved by: Kogoro Mouri (via Conan)
Kazumi Hayase
Next Conan's Hint: Drill (Part 1)
Rope (Part 2)
Staff
Director: Yasuichiro Yamamoto
Nobuharu Kamanaka
Screenplay: Hiro Masaki
Storyboard: Masaki Ozora
Episode director: 1195: Yuki Kawakata
1196:
Yoshihiro Sugai
Tsukasa Saito (asst.)
Animation director: 1195:
Kaoru Nagakawa
Michitaka Yamamoto
Yukari Kamiaka
Zi Dengjia
Marie Nagano
Kana Aoki
Asuka Tsubuki
1196:
Kosei Takahashi
Eiichi Tokura
Character design: Masatomo Sudo
Masanori Hashimoto (sub-character)
Hiroshi Ogawa (design works)
Production cooperation: 1195: Azeta Pictures
1196: Mouse
Voice Cast:

Minami Takayama as Conan Edogawa
Akemi Okamura as Ran Mouri
Rikiya Koyama as Kogoro Mouri
Chafurin as Juzo Megure
Wataru Takagi as Wataru Takagi
Yoshimitsu Shimoyama as Sensuke Tsurufuji
Taro Kiuchi as Satoshi Omagari
Akeno Watanabe as Yoko Tsurufuji
Mie Sonozaki as Maimai Tsurufuji
Azusa Tadokoro as Kaoru Neji
Junya Enoki as Kazumi Hayase

Music
Opening song: Heaven Knows
Closing song: TOWA ~Towa ni Kaze ni Noru~

The Spiral Mansion Mystery (館ミステリー 渦巻館 Yakata Misuterī Uzumaki-kan?) is the 1195th and 1196th episode of the Detective Conan anime.

Cast

Gadgets

Case

Situation

Part 1

A few days ago, Kogoro got hyped up when he saw Yoko Okino at the Spiral Mansion on TV, so he is taking Conan and Ran to the location today.

The Tower of Babel
The Abyss

The family are still debating about the tower of Babel when the curator Kaoru Neji arrives and explains to them about various spiral art and the owner of them, Kyu Tsurufuji. Later, the art magazine editor Kazumi Hayase arrives as he has an appointment with Neji and several members of Tsurufuji family: Kyu’s son Sensuke Tsurufuji, Sensuke’s younger sister Maimai Tsurufuji, and Sensuke’s wife Yoko Tsurufuji. While the Mouris continue their visit, the people in the appointment seem to have split opinions when Hayase tells them that the publication fee is 300.000 yen.

Even though Maimai accepts the deal, both Sensuke and his wife refuse it because they don’t have the money to. As Sensuke leaves the room, followed by Maimai to convince him to reconsider, Yoko also leaves on her own while Hayase apologizes for what happened, to which Neji tells him that it’s not his fault, and thanked him for coming.

Meanwhile, Kogoro and his family have just finished a room, and decide to go to another one. On their way outside of the room, they realize that there is no more room to visit that way, so they will have to go on another route, but their visit is cut off by a scream, followed by a gunshot. Kogoro tells Ran and Conan not to follow him, only for him to realize they did the complete opposite when he discovered the body of Sensuke. Still, he asks his daughter to call the police.

Murder
Location: Bathroom in the Spiral Mansion 3rd floor
Victim: Sensuke Tsurufuji
Age: 41 years old
Cause of death: Gunshot wound to chest
Suspects: Kaoru Neji, Kazumi Hayase, Maimai Tsurufuji, Yoko Tsurufuji

The police begin asking some questions about the victim and what the suspects did before he is dead. The suspicions rise toward Maimai as no one can verify if Maimai was in the studio all the time after the meeting. Suddenly, Maimai's husband Satoshi Omagari appears and states that she is innocent, without a clear reason why.

Later, Conan is checking the manual guidebook of the mansion, then he notices that something is different when he walks from the 3rd to the 4rd floor of the mansion compared to when he walks from one to another. From there, he asks Yoko Tsurufuji for the blueprint of the building, to which she suggests he go outside and ask Neji instead. When Hayase is convincing Neji to quit working at the mansion and come to work at his place, they are disrupted by Conan asking for the blueprint.

The board at the top of the spiral stairs

However, Conan finds no useful clue from it and has to walk around again, until he rethinks about the dialogue at the top of the mansion and sees both the tower of Babel and the Abyss, he realizes that he should use the tower to put in the Abyss.

Conan and Ran then come and ask Neji for permission to do it, she hesitates, but Maimai says that she shared the same curiosity with Conan when she was a little. And she decides to do it, and tells that her dad would approve of this as if he was alive. Maimai and Neji put the tower on the Abyss, then Maimai spins the object until they hear a sound of an ancient mechanism.

The floor has been lowered

As the sound of the ancient mechanism ends, the four are surprised to see that the floor they are standing on has lowered. Conan then leads everyone to the top of the spiral stairs, which is no longer a dead end, taking everyone to discover the secret room of the mansion. Inside the room, there are even more of Kyu’s conceptual art. However, Kogoro realizes that Satoshi has gone for quite a while, to which Maimai tells that he always has a habit of jogging around, up to one hour. Since it has been longer than one hour ever since Satoshi was out, Megure orders Takagi to find Satoshi.

Murder
Location: A stream near the Spiral Mansion
Victim: Satoshi Omagari
Age: 39 years old
Time: 1:15 PM
Cause of death: Cerebral contusion from a blow to the back of the head
Suspects: Kaoru Neji, Kazumi Hayase, Maimai Tsurufuji, and Yoko Tsurufuji

Part 2

The body of Satoshi is found at the stream near the Spiral Mansion, much to Maimai’s misery. The police begin to verify the alibis of the remaining suspects at 1:15 PM, the estimated time when he died. Maimai was working at the studio again after the interrogation; while Neji was talking to Hayase; and Yoko was standing where Conan came to ask for the blueprint, with the only exception of going to the restroom.

Conan arrives at the place where Satoshi was finishing his newest sketch for investigation, then he wanders around the mansion and overhears the conversation between Yoko Tsurufuji and Maimai about splitting properties after the case is over. However, since Sensuke had already decided that his father’s art would belong to the museum, both of them will have "zero divided by any non-zero natural number equals zero" in terms of property. Maimai has no problem with that, but Yoko does as she angrily leaves the room. After Yoko is not in Conan’s eyes range, Maimai comes out and asks him what he wanted. He says that he wants to see her husband’s latest sketch, to which she agrees.

Satoshi's drawing is actually used to hide Kyu's art that he was going to sold

Conan notices that the drawing is double-layered, with the outer layer usually used to correct the inner layer, making her wonder what is in the inner layer. Much to her shock, she finds out that Satoshi has been using his sketch as a way to sell her father’s art, even though she was extremely upset with the news, she still tells Conan not to reveal this to anyone. He agrees to.

As Conan goes outside again, he notices how the windows are actually clean instead of dusty outside, so he reaches out to Neji to ask how they clean the outside of the windows. She explains that the window cleaners do it by carefully dropping themselves from the rooftop of the building, which has space for attaching ropes. She then asks Conan if she could make his discovery public since it can double the amount of visitors.

Attempt murder
Location: Outside Spiral Mansion
Victim: Kaoru Neji, and Conan Edogawa
Age: 25 years old (Neji), and 7 years old (Conan)
Time: At dusk
Cause of death: Dropping a brick onto her head
Suspects: Kazumi Hayase, Maimai Tsurufuji, and Yoko Tsurufuji
As Conan is thinking about Neji's offer, he sees a brick that is going to fall on to her, so he pushes her out. He looks up and sees someone standing at the rooftop.

He hesitates, but before he can think further, a brick is falling onto her, forcing Conan to push her out. He then sees someone on the rooftop of the building, so he goes to the location to find him, but only finds a rope that was probably used by the culprit to escape.

People

  • Resolution

    Trivia

    • The suspects have names related to "spirals/turning":
      • Sensuke Tsurufuji (弦藤 旋介)'s first name contains the kanji "旋" in "rotation" (旋回 senkai?) ;
      • Maimai Tsurufuji (弦藤 舞々)'s first name contains the kanji "舞" in "to rotate"/"to spin" (舞う mau?) ;
      • Kaoru Neji (根次 薫)'s last name is similar to "screw"/coil" (螺子 neji?) ;
      • Satoshi Omagari (大曲 悟志)'s last name contains the kanji for "twist"/"turn" ( magari?).


    In other languages

    Language Title Translation
    Flag of France French (Subbed) Mystère au manoir : Le Musée du tourbillon Mystery at the mansion: The spiral museum
    Flag of Germany German (Subbed) Mysterium im Museum: Die Spiralen-Villa Mystery at the Museum: The Spiral Villa
    Flag of South Korea Korean 소용돌이 저택 미스터리 The Spiral Mansion Mystery

    References

    See also

    Episodes of Season 31
    Episode 11871188118911901191119211931194119511961197119811991200120112021203