Skip to content
Anime Glossary
Anime portion of the Wotaku glossary!

Basic Terms ​

AnisonThe abbreviated form of Anime Song. It indicates the songs present in the Anime. Generally the opening (OP) and ending (ED). More info here
Anime OriginalContent that was not present in the original source material. Can be canon or filler.
CanonCanon refers to content that was not present in the original source material but is part of the anime storyline. Canon is used to expand the world-building of the anime, fix the pacing of the source material, or more character development.
FillerFiller refers to content that was not present in the original source material & doesn't affect the storyline. During filler, the story doesn't get any progression.
Original AnimeAnime that's not an adaptation of existing material such as Manga, Light novels, picture books, etc.
PVPromotional videos of the anime. Generally teaser, trailer, preview, etc.
Seiyuu / VAThe voice actor/actress of the anime.

Release terms ​

OADOriginal Animation DVD. OVAs that were bundled with the source material (e.g. manga).
ONAOriginal Net Animation. Anime that was originally released on an OTT platform.
OVAOriginal Video Animation. Anime that was originally released on a physical medium.
SimulcastSimultaneous broadcast or stream of the latest episodes alongside their country of origin.
SimuldubSimultaneous dub release of the latest episodes alongside their country of origin.
Cour, Season, Split-cour

In Japanese TV, the broadcast schedule is divided into four seasons: Spring (March -- May), Summer (June -- August), Autumn (September -- November), and Winter (December -- February). This means that an anime can have 13 episodes in each season.

  • Cour: Each 13eps/season is called a cour.
  • Season: The continuous run of an anime is called a season. It can be a 1 cour (Example: Chainsaw Man), 2 cour anime (Example: Kimetsu no Yaiba) or a 4 cour (Example: Naruto)
  • Split-cour: When the anime season isn't continuous and has a break of one or two cours. Example: Spy x Family

Episode Sections ​

BrandingThe logo animation of studios and the distributor of the anime are shown here. The topic is really well-explained by Channel 45
RecapRecaps the previous episode(s). Generally it's found in long-running shōnen series. Example
Cold OpeningIt's the portion of the anime before the OP. Sometimes it can be just a recap or a setup for the episode.
OPOpening sequence of the anime, generally 1.5 minutes long. Depending on the episode they can also be placed closer to the middle or at the very end (example: Solo leveling s01e01). The scenes shown in them can be made for the OP only and not appear in the actual show.
Title CardAlso known as Title sequence. It is a part of the OP. Example
Mixed OPWhen the OP is overlaid with the plot of the anime.
EyecatchThe animated sequence before the ad break or the end of the first part. It's generally a still frame. Example
EDThe ending sequence of the anime.
Mixed EDSame as Mixed OP but for ED. Chainsaw-man Ep 12 & Relife Ep 13
OmakeAn extra portion of the episode. Generally a filler. Example
PreviewShows a glimpse of the next episode which is generally an action sequence. This is also used as PV.

Technical terms ​

GengaThe raw keyframes of an anime scene. Dong Chang has explained the whole process in his video. Example: Jujutsu Kaisen

File Naming ​

Release group ​

The individual or team behind the release, also called Encoder in the case of encodes. Example: SubsPlease, Erai-raws, EMBER, Yameii, etc. Sometimes, the release group name is mentioned at the end.

Source ​

The origin of the release, so streaming sites or different disc releases (DVD, LaserDisc, Blu-ray, etc.).

  • WEB-DL: Untouched videos, downloaded from streaming sites without encoding
  • WEB-Rip: Videos sourced from streaming sites that went through screen-capture and/or encoding methods
  • BDISO: A disk image of a Blu-ray disc, needs to be mounted in order to be played (like other ISOs) and is used for making encodes or remuxes.
  • BDMV: Short for β€œBlu-ray Disc Movie”, a container format used to store high-definition video, audio, and other related content on Blu-ray discs.
  • Remux: Videos sourced from disc releases without encoding, making them have very high quality and file sizes.
  • Encode: A video that has gone through lossless or lossy compression processes in order to save file size, also called a DVDRip or BDRip.
  • Re-Encode: An encode that has gone through the process of further encoding, thus degrading in quality.
  • Mini-Encode: A video where the priority is the smallest possible file size, even if the quality would greatly suffer as a result.

Resolution ​

The number of pixels contained in each frame, a higher value means improved quality (unless it's an upscaled release). The most common ones are 360p, 480p, 576p, 720p, 1080p, and 2160p. Most anime nowadays are made in 1080p. So, most of the 2160p anime are interpolated. This interpolation can cause artifacts, over sharpening, or aggressive denoising since it's not really possible to add details out of nothing.

Video Codec ​

The encoding process for the video file. The most popular encoders today are x264 (AVC) and x265 (HEVC), with the latter being newer and able to achieve higher compression rates with less quality loss.

More about encoding

To learn more about encoding, visit Codec Wiki.

Audio Format ​

Used in the encoding process for encoding audio, divided into lossless and lossy formats.

  • Lossless: These retain the highest audio quality and have larger file sizes as a consequence. The most common ones are DTS, PCM, TrueHD, FLAC and WMA.
  • Lossy: These formats aim to provide good quality while keeping file sizes small. The most popular ones today are AAC, AC3, EAC3 (all commonly found in Web releases), with MP3 being found in older releases.

Subtitles ​

  • Raw: A video without subtitles.
  • Fansubs: Unofficial aka fan-made translations or an edited version of the official subtitle.
  • Hardsubs: Subtitles that are burned into the frames and are part of the video track itself, can't be turned off.
  • Softsubs: Subtitles that are contained on their own track inside a video file or a separate file that's loaded with the video, can be turned on or off.

File Hash ​

These are CRC32 codes, used to detect errors during file transmission. For example: 7BAAC64C. CRC generates a 32-bit code for each file (in hexadecimal, it's 8 digits). Fansubbers include these codes in the filename so that users can easily check whether the downloaded file is corrupted or not. If the file is corrupted, the user will receive a different code than the one written in the file name.

Video Format ​

The container used for the video file, with the most widely used one today being MKV, for the ability to put multiple audio/subtitle tracks in one video file. The most popular one in the past was MP4, which focused on being compatible with a wide range of devices, but was only able to have burned-in hardsubs.