: A text file ( readme.txt or changelog.txt ) detailing the specific additions made during that month.

Based on the distribution patterns of such creator-led monthly archives (like those from Patreon or Itch.io ), a January 2023 "Kajin" file likely includes:

: Patches or new builds for ongoing interactive fiction or visual novel projects.

: High-resolution character illustrations, concept art, or animated scenes (often in .mp4 or .gif formats).

: You can use tools like 7-Zip or WinZip to see the file list before opening them.