Solving Mysteries in a Locked Room

Chronology
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Episode 900 (Int. Episode 955)
Information
Title:	Solving Mysteries in a Locked Room
Japanese title:	密室の謎解きショウ (Misshitsu no nazotoki shō)
Original airdate:	May 5, 2018 July 12, 2025 (Remastered version)
Broadcast rating:	6.9%
Remastered rating:	5.0%
Filler case:	#292
Season:	23
Manga source:	TV Original
Case
Cast:	Conan Edogawa Kogoro Mouri Juzo Megure Wataru Takagi
Case solved by:	Kogoro Mouri (via Conan)
Next Conan's Hint:	Ballpoint pen Dynamite (Remastered version)
Staff
Director:	Yasuichiro Yamamoto
Screenplay:	Nobuo Ogizawa
Storyboard:	Mitsuko Kase
Episode director:	Minoru Tozawa
Animation director:	Seiji Muta (supervisor) Keiko Sasaki
Character design:	Masatomo Sudo Akio Kawamura (sub-character) Kanako Ono (design works)
Voice Cast: Minami Takayama as Conan Edogawa Rikiya Koyama as Kogoro Mouri Hidenari Ugaki as Benkichi Yamanami Hisao Egawa as Toichiro Azuma Go Inoue as Haruhiko Kasai Masahito Yabe as Mitsuru Kitao Emiri Kato as Sueko Suematsu Yuko Kaida as Kana Tomurai
Music
Opening song:	Everything OK!!
Closing song:	Kamikaze Express

Solving Mysteries in a Locked Room (密室の謎解きショウ ,Misshitsu no nazotoki shō) is the 900th episode of the Detective Conan anime.

Cast

Characters

Conan Edogawa

Kogoro Mouri

Juzo Megure (flashback)

Wataru Takagi (flashback)

Gadgets

Gadgets

Stun-Gun Wristwatch

Voice-Changing Bowtie

Case

Situation

Kogoro is asked to investigate a threatening phone call and an attempt to murder Toichiro Azuma by his secretary, Haruhiko Kasai. Having investigated the list of possible suspects that hold resentment towards Azuma for his underhanded business practices, Kogoro calls the suspects along with Azuma and his secretary to reveal the true culprit.

Attempted Murder

Location: Parking Lot

Victim: Toichiro Azuma

Age: 44 years old

Injury: Slash wound on the left arm

Suspects: Unknown

People

Toichiro Azuma
	Victim (slashed-injured) 44 years old Real Estate Company president

Haruhiko Kasai
	32 years old Toichiro's secretary

Benkichi Yamanami
	52 years old Office worker

Mitsuru Kitao
	26 years old Auto mechanic

Kana Tomurai
	30 years old Waitress

Sueko Suematsu
	21 years old Real Estate Agency clerk

Takashi Utsubo
	Deceased (illness) 33 years old Criminal

Man
	Convenience store manager

Resolution

  Show spoilers »

Drama conclusion

Kogoro deduces that the man who attempted to murder Azuma was his own secretary, Haruhiko Kasai. Conan then puts Kogoro to sleep and presents the rest of his deduction. Kasai's sister had got scored a well-paid job at a bank. Benkichi Yamanami threatened him to kill Azuma or he would have revealed his underhanded acts, depriving his sister of her job.

However, this seems to be a plot written by Kana Tomurai from Nichuiri Television to fool Kogoro and acted by the members of a drama club. This was the reason Azuma was hesitating involve the police in this matter.

Final conclusion

Kana Tomurai wanted to avenge the death of Takashi Utsubo. She tried to kill Kogoro with a gun. The dynamite which was fitted in one of the drama club's members was also not a prop. She threatened to blow him up if they tried to fail her plan. Finding no other choice, Conan resorts pleading, crying and begging Kana not to kill Kogoro, trying to emotionally manipulate her in every possible way to buy him enough time to fill up a PET bottle with water. With her guard down, he threw the PET bottle at her, disrupting her balance, climbing her and tackling her to the ground, also stealing the gun alongwith. The drama club members then prevented her escape by forcing her to the ground. The police are called and she is arrested.

Hostage Situation

Location: Warehouse

Victim: Kogoro Mouri

Age: 38 years old

Offense weapon: Revolver

Culprit: Kana Tomurai

Illness (Past)

Location: Prison

Victim: Takashi Utsubo

Age: 33 years old

Cause of death: Unspecified Illness

Six months ago, Utsubo disguised a murder as a suicide using a clever trick. Sleeping Kogoro solved the case, and Utsubo was imprisoned for the murder. Two months ago, Utsubo suddenly fell ill and died in prison.

Aftermath

Kogoro is oblivious to what had happened. He sees the signboard from Nichiuri TV and wonders if any shooting had taken place. Conan laughs at his ignorance.

Trivia

• The car shown in the garage scene is a 1997 Toyota Caldina 2.0 G (ST215G; pre-facelift).

Gallery

In other languages

Language	Title	Translation
Catalan (Catalan dub)	Espectacle en una habitació tancada	Show in a closed room
French (Subbed)	Résolution d'énigme à huis clos	Enigma resolution behind closed doors
Thai	โชว์ไขปริศนาในห้องปิดตาย	Solving a mystery in a locked room
Vietnamese	Màn trình diễn giải bí ẩn trong căn phòng khoá kín	The Solving Mystery Show in the Locked Room

See also

• Season 23