フラグ
Furagu
ふらぐ
From game programming, where setting a flag triggers a specific event. In otaku culture, a 'death flag' (死亡フラグ, shibou furagu) is the classic: a character says something like 'When this battle is over, I'm going to propose' and the audience immediately knows they're doomed. 'Romance flag' (恋愛フラグ, ren'ai furagu) marks the moment a love story clearly begins. Common expressions include フラグが立つ (a flag goes up — a sign appears), フラグを折る (breaking a flag — defying the expected outcome), and フラグ回収 (flag payoff — the foreshadowed event actually happens). Originally anime/game vocabulary, but now used casually in everyday life to joke about real-world situations that feel scripted.
Examples
「この戦いが終わったら結婚するんだ」←完全に死亡フラグ
When this battle is over, I'm going to get married.' — That's a textbook death flag.
Watching anime and commenting with friends
フラグ立ったなーと思ったら案の定だった
I thought 'flag raised' — and sure enough, it happened.
Talking about a movie
「絶対大丈夫」←これフラグでしょ
It'll be totally fine.' — That's a flag, right?
恋愛フラグが立ちまくってるのに気づかない主人公
The romance flags are flying left and right, but the protagonist doesn't notice a thing.