The first version of JJS appears to have been called Jujutsu Roughery or something very close to that, based on the community discussion I found. A Reddit thread from May 2025 specifically says people remembered the old name as “jujutsu rougery or something like that,” which suggests the earliest title was likely a rougher prototype name rather than the final Jujutsu Shenanigans.

What seems most likely

  • Old/prototype name: Jujutsu Roughery
  • Final name: Jujutsu Shenanigans

The evidence here is community-sourced , not an official developer statement, so there is a little uncertainty about the exact spelling. If you meant a different “JJS,” the name could refer to another project entirely, but in the Roblox context this is the likely answer.