The Spiral Mansion Mystery
(Int. Episode 1254-1255)
(Yakata Misuterī Uzumaki-kan)
April 4, 2026 (Part 2)
6.0% (Part 2)
Rope (Part 2)
• Kaoru Nagakawa
• Michitaka Yamamoto
• Yukari Kamiaka
• Zi Dengjia
• Marie Nagano
• Kana Aoki
• Asuka Tsubuki
1196:
• Kosei Takahashi
• Eiichi Tokura
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
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 three 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, Hayase tells them that the publication fee is 300.000 yen, despite Kyu's contribution to conceptual art.
Maimai accepts the deal, while both Sensuke and his wife refuse it, stating that they don’t have the money for that. Sensuke then leaves the room, with his sister trying to convince him to reconsider the offer. Yoko also leaves the meeting to return to her position. Hayase apologizes for messing up the atmosphere, to which Neji comforts him by saying it is not his fault and thanks him for coming to the meeting.
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, meaning they will have to go on another route. The three then hear a scream, which is followed by a gunshot.
The police begin asking some questions about the victim and what the suspects did before he is dead. The suspicions rise toward Maimai because 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 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. 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.
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. At first, she hesitates, but Maimai says that she shared the same curiosity with Conan when she was a little. She decides to do it nonetheless, believing that her dad wouldn't oppose her action. Maimai and Neji put the tower on the Abyss, then Maimai spins the object until they hear a sound of an ancient mechanism.
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 now leads to a secret room of a mansion instead of a dead end. Inside the room, there are even more of Kyu’s conceptual art. The discovery proves to be unhelpful for the case, so everyone is about to leave the room there again. Suddenly, 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.
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 wants. He says that he wants to see her husband’s latest sketch, to which she agrees.
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.
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" (曲 magari).
Gallery
In other languages
| Language | Title | Translation |
|---|---|---|
 French (Subbed) |
Mystère au manoir : Le Musée du tourbillon | Mystery at the mansion: The spiral museum |
 German (Subbed) |
Mysterium im Museum: Die Spiralen-Villa | Mystery at the Museum: The Spiral Villa |
 Korean |
소용돌이 저택 미스터리 | The Spiral Mansion Mystery |
See also
 Season 31 (2026)
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#1189:
#1198:
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| « Season 30 | List of episodes | N/A » |
- Episodes
- Anime Exclusive
- Cases involving murders
- Animation directed by Kaoru Nagakawa
- Animation directed by Michitaka Yamamoto
- Animation directed by Zi Dengjia
- Animation directed by Yukari Kamiaka
- Animation directed by Asuka Tsubuki
- Animation directed by Marie Nagano
- Animation directed by Kana Aoki
- Animation directed by Kosei Takahashi
- Animation directed by Eiichi Tokura