About Arc Almanac

What it is

After an anime season ends, Arc Almanac tells you where to pick up the story in the manga, light novel or web novel, whether that volume is out in English, and what the anime skipped. Every format is lined up on one spine of story arcs, so any two formats can be compared the same way.

The data is an open dataset in a git repository. Fan wikis can show the same tables on their own pages through a MediaWiki export; each series has a page with the files to paste.

Where the data comes from

Every mapping cites a source: publisher and official anime pages, Anime News Network, Wikipedia lists with citations, and series wikis. Arc summaries are written for this site.

Only official releases are recorded. The original free web novel counts as official. Key art comes from AniList.

How it is checked

The data is entered and checked by hand. Release facts carry the date they were last checked; across the site that is currently 21 Oct 2026. Publishers move faster than that, so a volume can come out before it shows here.

Every series is still a draft that the maintainer has not yet checked against the books. Each series page says so.Where the data is not fine enough to answer, the site says so.

Spoilers

Pick the last season you watched and every later arc is covered by a mosaic. Hover over or press and hold one arc to peek, or turn on “Reveal all spoilers”.

Report a correction

If a mapping or date is wrong, use the wrong-mapping form and include a source. You can also fix it yourself; see how to contribute.

Licenses

The data is licensed CC BY 4.0: reuse it anywhere, with credit to Arc Almanac contributors and a link to the license. The code is under the MIT License.