The Hotel Serial Bombing Case

Chronology
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Episode 1144-1145 (Int. Episode 1202-1203)
Information
Title:	The Hotel Serial Bombing Case
Japanese title:	ホテル連続爆破事件 (Hoteru Renzoku Bakuha Jiken)
Original airdate:	December 7, 2024 (Part 1) December 14, 2024 (Part 2)
Broadcast rating:	6.3% (Part 1) 6.5% (Part 2)
Manga case:	#315
Season:	29
Manga source:	Volume 103 - F3-5 (1094 · 1095 · 1096)
Case
Cast:	Conan Edogawa Masumi Sera Mary Sera Eri Kisaki Ran Mouri Kogoro Mouri Juzo Megure Wataru Takagi Kazunobu Chiba Mysterious Old Man Mysterious man with sunglasses
Case solved by:	Conan Edogawa Eri Kisaki Masumi Sera
Next Conan's Hint:	Square (part 1) Humidifier (Part 2)
Staff
Director:	Yasuichiro Yamamoto Nobuharu Kamanaka
Organizer:	Yasuyuki Honda
Storyboard:	Yasuyuki Honda
Episode director:	1144: Akira Yoshimura 1145: Ayumi Iemura
Animation director:	1144: • Masatomo Sudo (supervisor) • Yui Ushinohama • Kana Aoki • Marie Nagano • Ayaka Shimoji 1145: • Kenichi Otomo • Masahisa Koyata • FALCO Suzuki
Character design:	Masatomo Sudo Kana Aoki (sub-character) Hiroshi Ogawa (design works)
Voice Cast: Minami Takayama as Conan Edogawa Noriko Hidaka as Masumi Sera Takako Honda as Mary Sera Gara Takashima as Eri Kisaki Chafurin as Juzo Megure Wataru Takagi as Wataru Takagi Isshin Chiba as Kazunobu Chiba Shin Mori as Mysterious Old Man Ryota Takeuchi as Mysterious man with sunglasses Wakana Yamazaki as Ran Mouri Hiroki Takahashi as Danji Rinzaki Tomoko Naka as Seiko Ronda Daisuke Sakaguchi as Aruto Kureishi Yuko Sato as Receptionist A Yuko Iida as Receptionist B Moena Ashida as Woman (Episode 1145)
Music
Opening song:	Unraveling Love ~Sukoshi no Yūki~
Closing song:	Yume de Aimashō
First episode to feature Takako Honda as the voice of Mary Sera.

The Hotel Serial Bombing Case (ホテル連続爆破事件 ,Hoteru Renzoku Bakuha Jiken) is the 1144th and 1145th episode of the Detective Conan anime.

Cast

Characters

Conan Edogawa

Masumi Sera

Mary Sera

Eri Kisaki

Juzo Megure

Wataru Takagi

Kazunobu Chiba

Mysterious Old Man

Mysterious man with sunglasses

Ran Mouri (flashback)

Kogoro Mouri (flashback cameo)

Gadgets

Gadgets

Stun-Gun Wristwatch

Case

Situation

Part 1

Conan meets Masumi Sera when he is seen happy after buying three detective novels for a good price at a Haido bookstore following her suggestion, but she couldn’t open the bottle she is carrying as she has just finished repairing her car. Conan has no choice but to open it for her, not knowing that it is carbonated and it splatters all over him. Luckily, Masumi is currently staying at a hotel nearby, so she could help let Conan change his clothes there, in which he refuses because there have been two hotel bombing cases reported. But Masumi offers him to see the code left at the scenes of the incident in her computer, sparking his interest to investigate.

Serial Bombings (Past)

Location: Unknown

Suspects: Unknown

Fortunately, no death is reported. There were strange codes sent to the scene of the bombings.

It seems that the bottle that Masumi brought in the morning was an arrangement between Masumi and her mother so they could attempt to steal the antidote when Conan is taking a bath, but today he didn't bring it, so their plan is cancelled. Later, the reason why she was able to get the code of the first bombing was because she hacked into the phone of the employee who posted the code on the Internet after hearing rumours that the code was taken from it. In addition, the bomber also threatened not to evacuate or call the police.

Conan suddenly asks Masumi about the girl living with her after noticing some of the tea bags having signs that he assumes is British style of using tea when she is getting some for him. But before she could react, she and Conan hear voices outside, so the two go out and find out about the code of the aforementioned bomber and inform this to a bellboy named Aruto Kureishi, with him mentioning that the receptionist has received a call from the bomber with similar threats.

Hostage Situation - Planned bombing

Location: Haido Hotel

Suspects: Danji Rinzaki, Seiko Ronda and Aruto Kureishi

Considering the circumstances, the bomber must be one of the three person appeared when the voices about the code is heard by Conan and Sera.

The situation is getting dangerous as the bomb will go off in an hour when Conan and Sera meet up with Kisaki again and the two begin to inform her of the situation, since she is the most trustworthy person available for this kind of situation. The police have sent out a code from the second bombing to this hotel, but Conan and Masumi couldn’t have it, so they want to ask Kisaki for information and permission to join the case. At first, she refuses, but under the insistence of the two of them after knowing that she is the lawyer representing this hotel, she joins. After receiving the code from Kisaki, Conan quickly reveals how the bomber had set the code, thereby quickly reducing the number of suspected rooms to 6. From there, Kisaki plans to help send the bellboy and cleaner to start questioning in Masumi's room since they are most likely the bomber, with Mary also secretly helping so that she could preserve her identity.

Part 2

So the investigation to find the bomber begin:

• The first person to be questioned is the cleaner, she confirms that she had cleaned Danji Rinzaki's room but did not find any code at that time, not to mention she also expresses her discomfort at having to clean the room because he always violated the smoking policy and was kicked out of several hotels that coincidentally had bombings, luckily this hotel owner is a fan of his so he is allowed to stay. In addition, she was also asked to bring humidifiers to both rooms because she heard that someone was coughing, this accidentally alerted Sera because Mary often coughed for some reason.
• The second person to be questioned is Kureishi, who says that he had left immediately after delivering Rinzaki's luggage and had not entered his room.
• Finally, Rinzaki, although somewhat uncomfortable, accepts the questioning. He says that he had seen the code on the table near the humidifier after checking in and wondered if it belonged to the bomber. Kisaki lies that it was not and asks to search the room, he initially refuses but after hearing that he will be responsible if the bomb explodes, he complies.

However, Conan and Masumi (and others) are kicked out of the room soon after.

Despite being kicked out of the room, Kisaki, Conan, and Masumi show no signs of anxiety, and calmly tell the other two suspects that it will be fine to secretly evacuate those rooms, with Kureishi notifying room 2410; Kisaki and the cleaner will notify rooms 1412 and 1420; Masumi will evacuate rooms 1124 and 1214; and Conan will notify the receptionist. However, what we don't know is that Kisaki had secretly called the police before and now she is currently meeting with Megure and Takagi with the cleaner, implying that the truth of the matter has also been revealed.

People

Danji Rinzaki
	45 years old Haido Hotel guest

Seiko Ronda
	41 years old Haido Hotel cleaner

Aruto Kureishi
	34 years old Haido Hotel bellboy

Woman A
	Haido Hotel receptionist

Woman B
	Haido Hotel receptionist

Man
	Haido Hotel manager

Woman
	Rinzaki's mistress

Resolution

  Show spoilers »

Breaking the code

The serial bombing codes were called "the rail fence codes", the characters were arranged in a zigzag pattern along horizontal lines and linked in rows. In addition, Kisaki and the detectives also realize that the characters were arranged in the "shape" of alphabetical words on the same key.

• The first character of the first code is "Te", and the corresponding word is "W", so arranging the code in the shape of a W will give room 3420.
• The first character of the second code is "Mo", the corresponding word is "M", and rearranging the code in the shape of a zigzag M will give room 2614.
• The first character of the remaining code is "HI", the corresponding word is "V", and the corresponding room will be 2114, Rinzaki's room.

The bomber, what has he done and the purpose

The real bomber is Aruto Kureishi.

• He had made an extra key for room 2114 from the one he had picked up when Rinzaki accidentally dropped it earlier; he had also bombed hotels that had banned Rinzaki for smoking to create a motive for the bombings
• Before the target arrived to check in, Kureishi had transported the luggage with the bombs and hidden it, a while later he used "a timed phone" to make the call, and "another timed phone" to play the bomber's recording, while he had "another phone" to disconnect the call remotely.
• Finally, when the bomb is about to explode, Kisaki and the police assume that he will go to the rooftop to call the receptionist to inform them how to decrypt it and then throw the phone away while it is exploding to make it look like the bomber has committed suicide.

The reason Kureishi wanted to kill Rinzaki was because Rinzaki knew about his drug use and had blackmailed him.

However, Conan knew that he would not go to the rooftop to do that but would choose a room below or above the bombed room, and with the help of the receptionist, Conan found the current location of the bomber and ambushed him there. In the end, Kureishi is shot with a tranquilizer dart while waiting for Takagi to escort him according to the boy's message, ending the case.

However, things haven't ended there

The Mysterious man with sunglasses starts the fire hydrant to make Mary and Masumi run outside the hotel, thus allowing the Mysterious Old Man to look at Mary and stating that it is just as he dreamed of.

Manga to anime changes

• Several scenes are not included in the anime:

• Eri explaining that she just had a hearing about labor problems before she met Conan and Masumi.
• Masumi making comments after she read Rinzaki's work on his laptop.
• Eri convincing others to not rely on the police and try their best to evacuate people from the potentially targeted rooms, while proceeding with Conan, Masumi and Ronda, leaving Kureishi behind.

  Show spoilers »

* After Masumi understands that the police might find marijuana if they search Rinzaki's room, Mary replied that she is counting on her. Mary's line is not in the manga.

Trivia

• The books Conan buys at the used book store are named after actual detective mangas: "Police in a Box" after Police in a Pod, "The Pharmaceutical Diaries" after The Apothecary Diaries and "Don't Call it a Mistake" after Don't Call it a Mystery.
• The hotel humidifier is a Sharp KC850U.
• While leaving the room, Rinzaki's mistress states that she is an editor from Chūgakukan (中学館), a reference to Daigakukan Publishing (大学館), a well established publishing company in the series, that is in fact named after the publisher of Detective Conan, Shogakukan (小学館).
• The suspects are named after types of black tea:
  • Danji Rinzaki (林崎 団司) is named after Darjeeling tea ;
  • Seiko Ronda (論田 盛子) is named after Ceylon tea ;
  • Aruto Kureishi (暮石 有斗) is named after Earl Grey tea.

Gallery

In other languages

Language	Title	Translation
Arabic	جرائم التفجير المتتالية	Consecutive bombing crimes
Catalan (Catalan dub)	El cas de les explosions en hotels	The case of the hotel explosions
French (Subbed)	L'Affaire des attentats hôteliers	The Hotel Bombing Case
Thai	คดีวางระเบิดโรงแรมต่อเนื่อง	The Hotel Serial Bombing Case

See also

• Season 29