IFR25KU: The Institute of Fairy Research 2025 Kakera Unofficial
IFR25KU is an unofficial Kakera-based mod, and its setting draws on the MirageFairy universe, a world with fairies, Mirage plants and crystals that store souls.
What it does
The mod builds on the MirageFairy setting, a fictional universe in which the world's history includes a vacuum decay reactor that was never safe, a collapse about 30,000 years ago and the Mirage, a shy fairy that vanishes when pursued. Its content draws on that lore, with fairies, plants and matter from the setting. The author's notes describe the material as an unofficial interpretation, and a Japanese fan wiki covers the universe in more detail.
IFR25KU requires Architectury API, Cloth Config API, Fabric API, Fabric Language Kotlin, Forgified Fabric API, Kotlin for Forge, TerraBlender and oωo (owo-lib). EMI and Roughly Enough Items (REI) are optional and add recipe and item lookup. The code is open source under the Apache License 2.0, and public links exist for the source, the issue tracker and a wiki. Installation covers the server and each player's game. Builds are published for Fabric and NeoForge for 1.21.1, with the latest files dated 2026-10-12.
Key features
MirageFairy setting
Content follows the fictional MirageFairy universe, including its fairies, Mirage plants and the reasoning behind them.
World generation
Terrain features and biome additions are generated in new worlds, using TerraBlender for biome placement.
Lore-driven items
Items and materials named after setting concepts such as crystallized souls and the Miragium.
Optional item lookup
EMI or REI can display the mod's recipes and items when either is installed.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 6
Optional 2
Use cases
Story-driven survival
Players who want a world shaped by the MirageFairy lore can use the mod as a background for a long survival run.
Wiki-based exploration
Players reading the Japanese fan wiki can compare its entries with the in-game content.
Who it’s for: Players interested in the MirageFairy setting and in unofficial lore-based content. Server owners need to install it on the server and on every client.
Questions
Does IFR25KU need Fabric API on NeoForge?
Which loaders are supported?
Does the server need the mod?
In the catalog
IFR25KU: The Institute of Fairy Research 2025 Kakera Unofficial is one of 7,216 Magic mods on ModsFinder, and one of 3,630 Magic mods for Fabric. 32,366 mods support Minecraft 1.21.1.
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What the author says
“Damn it, the vacuum decay reactor was never something humans should have messed with!” “The vacuum decay reactor wasn't a safe, environmentally friendly source of energy.”
Official listing
- Modrinth page
- modrinth.com/mod/ifr25ku
- Owner
- yoruno_kakera
- Published
- 2025-08-27
- Updated on Modrinth
- 2026-10-12
- Facts verified
- 2026-10-15