How to Name Anime Files for Plex, Jellyfin, Emby, and Kodi

Anime is the hardest thing to organize in a media library, and it is almost always the same root cause: numbering. Fansub and release names count episodes absolutely (episode 137), while metadata providers usually organize them into seasons (S04E11). When those two disagree, your server matches the wrong episode — or none. Here is how to name anime so it identifies cleanly.

Absolute vs seasonal numbering

• Absolute numbering counts every episode of a series in one continuous run: 1, 2, 3 … 137.
• Seasonal numbering splits the same run into seasons: S01E01, S02E01, and so on.

Long-running shows are where this bites hardest. An episode labelled - 137 means nothing to a scanner expecting S04E11, so it guesses, and guesses wrong.

Match your provider's ordering

The fix is to name files in the same ordering your metadata provider uses. Most media-server agents expect seasonal numbering:

Shows/Series Title (Year)/Season 04/Series Title (Year) - S04E11 - Episode Title.mkv

If you have absolute-numbered files, you need to map each absolute number to its season and episode before renaming. Providers like TVDB publish both orderings, so the mapping exists — it just has to be applied consistently across the series.

Practical rules that prevent mismatches

• Pick one ordering per series and stick to it. Mixing absolute and seasonal in one show guarantees chaos.
• Zero-pad season and episode numbers (S04E11, not S4E11).
• Put specials, OVAs, and movies in Season 00 or as separate movie entries, not inline with the main run.
• Keep the series year in the folder name to disambiguate reboots and same-titled series.
• Watch for combined-season releases that renumber episodes; those need remapping most often.

Let identification do the mapping

Hand-mapping hundreds of episodes from absolute to seasonal is exactly the kind of tedious, error-prone work worth automating. A good organizer identifies difficult titles against anime-aware sources and proposes the correct seasonal layout for you to review.

MetaTana uses anime-aware identification with an AI-assisted fallback for the difficult files typed sources and filenames get wrong, then proposes a clean, reviewable rename you can roll back. It writes NFO and artwork beside your files without touching the media itself. For the general naming rules, see How to bulk rename movie and TV files; for player specifics, see the Jellyfin, Plex, Emby, and Kodi guides.