Japanese by Example
Learning through examples in manga

A poison's composition with 成分

名探偵コナン » Volume 14 » Page 15

A client tells Detective Mouri about the condition in which she found her deceased husband. Hearing the details, Conan identified the likely poison, including the composition, the dosage required to kill, and the internal effects it has on a person. When Ran asks how he knows all this, Conan covers by saying the monster villain on the kid’s TV show he wanted explained it.

(らん):
随分(ずいぶん) 丁寧(ていねい)怪人(かいじん)ね… (どく)成分(せいぶん)まで(おし)えてくれるなんて…」
“What a polite villain... Going so far as to tell me the poison's composition...”
コナン:
「そんな怪人(かいじん)いねーよ…」
“No such monster exists...”