Case Closed - Season 1 - Eps 643: A Critical Moment from the Karuta Cards (2)
Before Masao is escorted out of the room, he shouts "take out the towel" and declares the towel to have a pattern of a horsehair crab from Lake Suwa. Haibara examines Masao's cards which consist of Ru (る), Ko (こ), Ni (に), and Te (て) in that order. Haibara realizes Masao is telling them to take the words towel (タオル, ta o ru), horsehair crab (ケガニ, ke ga ni), and Lake Suwa (諏訪湖, Su wa ko), and to treat the middle characters as a Japanese particle. In doing so, Ru becomes Ta, Ko becomes Su, Ni becomes Ke, and Te remains unchanged. Reading the changed words from Masao's card order reveals the message Ta Su Ke Te (助けて, lit. "Help Me"). The criminals reveal they have been eavesdropping on their conversation through a cellphone and decide to kill the kids as a result. Haibara deduces they are after the tax evasion evidence of a company that was sent to a television producer from the previous resident of the Urafune household.
About Case Closed

Title: Case Closed
First Air Date: 1996-01-08
Last Air Date: 2025-03-08
Status: Returning Series
Rating: 8/10 (from 683 votes)
Language: JA
Seasons: 2
Total Episodes: 1157
Network: YTV
Genres: Animation, Crime, Mystery, Comedy
Production Companies: TMS Entertainment, Kyokuichi-Tokyo Movie
Synopsis
The son of a world famous mystery writer, Jimmy Kudo, has achieved his own notoriety by assisting the local police as a student detective. He has always been able to solve the most difficult of criminal cases using his wits and power of reason.
Cast

Minami Takayama
Conan Edogawa (voice)

Kappei Yamaguchi
Shinichi Kudo (voice)

Wakana Yamazaki
Ran Mouri (voice)

Akira Kamiya
Kogoro Mouri (voice)

Rikiya Koyama
Kogoro Mouri (voice)

Megumi Hayashibara
Ai Haibara (voice)

Kenichi Ogata
Hiroshi Agasa (voice)

Yukiko Iwai
Ayumi Yoshida (voice)

Wataru Takagi
Genta Kojima (voice)

Ikue Otani
Mitsuhiko Tsuburaya (voice)