Strange Mystery
Mystery Case
noun
Remember how 事件 means "incident"? Well, a suspicious incident always has a strange mystery behind it. It also always turns into a mystery case.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
とんだ怪事件だったね。
It was such a strange mystery, wasn't it?
コウイチの書いた「トーフグオフィスの怪事件」は、エドガー・アラン・ポーの「マリー・ロジェエの怪事件」とならぶ、素晴らしい作品だ。
Koichi's "The Mysterious Affair at the Tofugu Office" is a masterpiece that is as good as Edgar Allan Poe's "The Mystery of Marie Roget.”
ホームズでさえもその怪事件の糸口を見つけることはできないだろう。
Even Holmes wouldn’t be able to find a clue to that mystery.