OP

• Reading: オーピー
• Romaji: oopii
• Kanji breakdown: Abbreviation of English 'opening.' Written in roman letters (OP) in Japanese contexts.
• Pronunciation: /o.o.pi.i/

Meaning

Opening theme; the song and animation sequence that plays at the start of each anime episode.

OP (pronounced オーピー) is one of the most fundamental terms in anime fandom. The opening sequence — combining animation, music, and often hidden foreshadowing — is a beloved art form in itself. Fans analyze OP visuals frame by frame, debate which anime has the best OP, and many discover new music through OPs. A great OP sets the tone for the entire series, and some become more famous than the anime itself.

Examples

1. このアニメOP変わったけど前のほうが好きだったな。 This anime changed its OP but I liked the old one better.
2. OP映像にネタバレ仕込んでくるの本当にやめてほしい。 I seriously wish they'd stop hiding spoilers in the OP visuals.
3. OPだけでそのクール覇権取れるレベルの曲じゃん。 This OP is good enough to dominate the whole season on its own.

Usage Guide

Context: anime discussion, social media, friends, online forums

Tone: enthusiastic, analytical

Do Say

• 今期アニメで一番OPがいいのどれ？ (Which anime this season has the best OP?)
• OP飛ばさないで毎回ちゃんと見るタイプ。 (I'm the type who watches the OP every episode without skipping.)

Don't Say

• ドラマや映画のテーマ曲に「OP」は普通使わない — OP is specific to anime/game episode format, not films or dramas

Common Mistakes

• Confusing OP with 主題歌 — OP is the per-episode opening sequence, while 主題歌 can refer to a work's overall theme song
• Using OP for One Piece in a music discussion — context matters, as OP also commonly abbreviates ワンピース

Origin & History

Abbreviation of English 'opening.' Standard anime terminology since the 1990s when fan communities began systematically cataloguing anime music. Written as OP (roman letters) even in Japanese text.

Cultural Context

Era: 1990s anime fan terminology, now universal

Generation: Primarily teens to 40s, anime viewers

Social background: Universal among anime fans

Regional notes: Used across all of Japan and internationally. 'OP ranking' discussions are a staple of every anime season.