Anime Terms Glossary: Isekai, Tsundere, and Otaku Vocabulary Explained

Tap a term commonly used among anime fans to see what it means.

Shōnen (少年)

A genre aimed mainly at boys and young male readers, typically featuring coming-of-age stories built around friendship, hard work, and victory.

Shōjo (少女)

A genre aimed mainly at girls and female readers, with stories centered on romance and nuanced emotional development.

Isekai (異世界)

A story format in which the protagonist is transported to a completely different world — often via an accident or reincarnation — and begins a new life there.

Tsundere

A character type who is initially curt and cold but gradually reveals a warmer, more affectionate side.

Kuudere

A character type who appears expressionless and emotionally reserved on the outside but has a warm heart underneath.

Senpai and Kōhai (先輩・後輩)

A Japanese cultural concept describing the hierarchical relationship between someone who joined a school or organization earlier (senpai) and someone who joined later (kōhai).

Waifu

Fandom term for a female anime character a fan is especially fond of; the male equivalent is sometimes called a "husbando."

OVA (Original Video Animation)

An anime work released directly to video or digital formats without ever airing on TV or in theaters.

Seiyū (声優)

A professional actor who voices characters in anime or video games — in Japan, seiyū have become stars in their own right, with an industry built around their popularity.

Chibi (ちび)

An art style that cutely deforms characters with oversized heads and small bodies.

Filler

Episodes added by the anime production itself, not present in the source manga, typically used while waiting for the source material to progress further.

Cosplay

The hobby of recreating and wearing costumes and makeup based on characters from anime, games, and similar media — short for "Costume Play."

Why Is Anime Vocabulary So Varied?

Japanese animation has developed its own distinctive genres and fan culture over a long history, and along the way, a wide range of terms naturally emerged to concisely describe a work's style or character archetypes.

Are These Terms Used Worldwide?

Yes — though originally Japanese expressions, as anime has grown popular globally, terms like "isekai" and "tsundere" have become international vocabulary, used as-is (in their original pronunciation) by fandoms abroad.

Frequently Asked Questions

Do these terms refer to a specific show?

No — the terms on this page describe genres, character archetypes, and industry vocabulary that appear across many different works, not any single title.

Is this easy to follow for beginners?

Yes — this page is written with everyday language rather than technical jargon, so it's accessible even to people who are new to anime.