Well, I've thought about this for a few days and I feel like the Star Army wouldn't be interested in non-targeted, unpredictable weapons like this, especially given that it could be accidentally spread to the wrong planets, etc. In fact, I feel like only an evil faction would use this at all. If the Star Army wants to take over a planet, we have an quasi-unlimited supply of Nekovalkyrja soldiers who are trained to take over planets.
Due to this, I have decided not to FM approve the submission for Yamatai.
On a technical level it's okay for the SARPiverse, although it's pretty vague about what it would actually affect.
By the way, your character in Yamatai could still make this, but you'd have to adjust the submission to say it's not something official.