Underwater Key in the Locked Room Case

Chronology
‹ Sonoko's Dangerous Summer Story	List of Episodes	Metropolitan Police Detective Love Story 2 ›

Episode 155 (Int. Episode {{{int-episode}}})
Information
Title:	Underwater Key in the Locked Room Case
Japanese title:	水中の鍵密室事件 (Suichū no Kagi Misshitsu Jiken)
Original airdate:	August 2, 1999
Broadcast rating:	16.4%
Filler case:	#57
Season:	6
Manga source:	TV Original
Case
Cast:	Conan Edogawa Ran Mouri Kogoro Mouri Juzo Megure Wataru Takagi Detective Yokoyama
Case solved by:	Conan Edogawa
Next Conan's Hint:	Crayon
Staff
Director:	Yasuichiro Yamamoto Kenji Kodama
Screenplay:	Kazunari Kouchi
Storyboard:	Takashi Iwama
Episode director:	Kouichi Sasaki
Animation director:	Masayuki Hiraoka
Voice Cast: Minami Takayama as Conan Edogawa Wakana Yamazaki as Ran Mouri Akira Kamiya as Kogoro Mouri Chafurin as Juzo Megure Wataru Takagi as Wataru Takagi, Next Conan's Hint Takayuki Inoue as Detective Yokoyama Junko Hori as Mitsue Souda Susumu Chiba as Yoshihiko Kido
Music
Opening song:	Girigiri chop
Closing song:	Free Magic

Underwater Key in the Locked Room Case (水中の鍵密室事件 ,Suichū no Kagi Misshitsu Jiken) is the 155th episode of Detective Conan anime.

Cast

Characters
Conan Edogawa Ran Mouri Kogoro Mouri Juzo Megure Wataru Takagi Detective Yokoyama

Case

Situation

Kogoro, Ran, and Conan pay a visit to an old woman. She decides to take them to her grandson, but he's found dead when they get into the house. The front door is locked however. How could this have happened? Rather than use Sleeping Kogoro for the case, Conan solves this one as himself.

Suicide?
	Location: Souda household Victim: Makoto Souda Age: 22 years old Cause of death: Blood Loss Suspects: Yoshihiko Kido Makoto was found in his bathroom, with his slit wrist in a bathtub of blood. It seems like a suicide, but Mitsue insists that her grandson didn't kill himself.

People

Mitsue Souda
	73 years old Hikari Maison landlady Kogoro's acquaintance

Makoto Souda
	Victim (wrist slit) 22 years old Mitsue's grandson

Yoshihiko Kido
	22 years old Jonan University medical student 4th Year

Mitsue Souda's Watchdog
100px	Apartment Watchdog Mitsue's Watchdog

Resolution

  Show spoilers »

The culprit is Yoshihiko Kido.

After locking the front door, he attached the key to a beetle with a string made of toilet paper and dropped it through the mail slot. He put a sweater on the front door tiles so that the beetle could walk more easily. He covered the top of the model with a scent that attracts male beetles in order to guide the beetle. As it walked across the bridge, the key fell into the model's moat and the string melted, leaving the key behind. The beetle would then fly out of the room through a window, attracted to the light outside. In this manner, he was able to create a locked room.

The proof is Yoshihiko's handkerchief, which was covered in Mitsue's homemade juice that she brought to the apartment that afternoon. While in the apartment, he had cleaned it up earlier to keep the beetle from being distracted by the juice's strong scent.

Makoto and Yoshihiko had a plan to smuggle clinical drugs out of their university's laboratories and sell them. Makoto, however, changed his mind and didn't want to continue the plan anymore. Yoshihiko was afraid that Makoto would leak it, and killed him. Mitsue angrily slaps him and breaks down, while Kogoro and the police scold him.

Trivia

  Show spoilers »

• Floor tiles are hard for Beetles to walk across.
• Conan managed to do his own Deduction show from start to finish for the first time in this case, without name dropping Shinichi Kudo's name as he did in The Mysterious Mole Alien Case.

BGM listing

#	Song Title	Romaji	Translation	OST
1	ギリギリchop	Girigiri chop	On the edge chop	Girigiri chop
2	昼下がりの天使たち （摩天楼ヴァージョン）	Hirusagari no Tenshitachi (Mantenrō Vājon)	Early Afternoon Angels (Skyscraper Version)	Detective Conan "The Time-Bombed Skyscraper" Original Soundtrack
3	推理 （オリジナルver.）	Suiri (Orijinaru ver.)	Deduction (Original ver.)	Detective Conan Original Soundtrack 2
4	緊迫	Kinpaku	Tension	Detective Conan Original Soundtrack 2
5	事件現場 （謎ver.）	Jiken Genba (Nazo ver.)	Scene of the Case (Mystery ver.)	Detective Conan Original Soundtrack 2
6	犯人のアジト （忍び込みver.）	Hannin no Ajito (Shinobikomi ver.)	The Culprit's Hideout (Creeping In ver.)	Detective Conan Original Soundtrack 2
7	トリック	Torikku	Trick	Detective Conan "The Fourteenth Target" Original Soundtrack
8	犯人からの電話	Hannin Kara no Denwa	Phone Call From the Culprit	Detective Conan "The Time-Bombed Skyscraper" Original Soundtrack
9	ターゲット サスペンスＣ	Tāgetto Sasupensu C	Target Suspense C	Detective Conan "The Fourteenth Target" Original Soundtrack
10	西の名探偵 （摩天楼ヴァージョン）	Nishi no Meitantei (Mantenrō Vājon)	The Great Detective of the West (Skyscraper Version)	Detective Conan "The Time-Bombed Skyscraper" Original Soundtrack
11	沈む夕陽	Shizumu Yūhi	Depressing Sunset	Detective Conan Original Soundtrack 1
12	名探偵コナン・メインテーマ （ヴォーカル・ヴァージョン)	Meitantei Konan・Mein Tēma (Vōkaru・Vājon)	Detective Conan Main Theme (Vocal Version)	Detective Conan Original Soundtrack 1
13	Free Magic	Free Magic	Free Magic	Free Magic
14	事件解決 （意気揚々ver.）	Jiken Kaiketsu (Ikiyōyō ver.)	Case Resolution (Triumphant ver.)	Detective Conan Original Soundtrack 2

In other languages

Language	Title	Translation
Arabic	الخنفساء الجائعة	The Hungry Beetle
Catalan (Catalan dub)	El cas de l'habitació tancada i la clau a l'aigua	The closed room and the key in the water case
Catalan (Valencian dub)	El cas de l'habitació tancada amb una clau sota l'aigua	The closed room with a key under the water case
French	Un Mystérieux suicide	A Mysterious Suicide
Galician	O caso da chave da auga nun piso pechado	The key in the water in a closed apartment case
German	Ein Käfer kommt selten allein	A Beetle Seldom Comes Alone
Italian	Il caso della chiave nell'acqua	The Underwater Key Case
Spanish (American dub)	El caso de la llave bajo el agua	The key under the water case
Spanish (Castilian dub)	El caso de la habitación cerrada con una llave bajo el agua	The closed room with a key under the water case
Thai	คดีห้องปิดตายกุญแจอยู่ในน้ำ	A locked room case - The key is in underwater
Vietnamese	Án mạng trong phòng kín chiếc chìa khóa dưới nước	Underwater Key in the Locked Room Murder Case

See also

• Season 6