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オタク otaku
The word all fandom vocabulary hangs off.
What does otaku mean?
Someone whose knowledge of one thing has gone far past reasonable. Anime, trains, coffee, stationery — the subject is optional, the depth is not. Mostly a self-description now.
Example
学生の頃からずっと映画オタクなんだ。
I've been a film otaku since I was a student.
Vibe
Who you can say this to, and how it lands.
Safe to use Fine in ordinary conversation.
Culture note
Written おたく, オタク or clipped to ヲタ depending on the flavour you want. Outside Japan it usually means anime fan specifically, which is narrower than the Japanese use.
The story behind otaku
It started as a pronoun. お宅 is a polite, distant way of saying you, and early fans at conventions in the late 1970s used it with each other, keeping a courteous gap around a shared obsession. A magazine column in 1983 seized on the habit and made it a label for the whole crowd, half amused, half sneering.
Then came 1989, when coverage of a criminal case tied the word to something monstrous and made it a public accusation for years. Recovery was slow and came from inside: fans kept using it about themselves, the culture kept exporting, and by the 2010s the surrounding economy was a tourism pitch. It is now largely neutral, but the safest use is still about yourself.
Get otaku in your pocket
オタク is one of 308 words in YABAI, a Japanese culture snack for Android. Every word comes with its meaning, an example sentence, a vibe check and a story like the one above — in 13 languages, read aloud by your device. Paid app: no ads, no sign-up, no subscription.
