I'm sorry but this is WRONG.
Element 115 is a real element in REAL life.
It came from a meteorite that was known as the Tungusten (misspelled) event. The meteorite actually landed in an area that looks VERY similar to the map Shi No Numa.
From that point on, everything that happened to samples taken, was all rumor and legend and old stories that people thought of, or claimed to have happened.
I don't remember who got to the meteor first to extract the element, or how much was extracted. But it did eventually end up in the Factory of Der Riese. There the radiation from the meteor was li